If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933 check the following box: x

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ¨

If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ¨

If this Form is a post-effective amendment filed pursuant to Rule 462(d) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ¨

If delivery of the prospectus is expected to be made pursuant to Rule 434, please check the following box. ¨

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On December 22, 2004, we issued to Fletcher International, Ltd., or Fletcher, 1,261,829 shares of our common stock in connection with the exercise of an investment right originally issued to Fletcher in a private placement transaction in January 2004 and on April 20, 2005 we issued 66,413 shares of our common stock to Fletcher in connection with our failure to satisfy certain registration requirements relating to such 1,261,829 shares of our common stock. Under our agreement with Fletcher, we agreed to file a registration statement to permit the selling security holders named in this prospectus to sell the number of shares of common stock indicated in this prospectus that are issued to the selling security holders. The selling security holders named in this prospectus may offer and sell these shares of common stock from time to time.

The selling security holders or their pledges, donees, transferees or other successors in interest may, but are not required to, sell their common stock in a number of different ways and at varying prices. See "Plan of Distribution" on page 15 for a further description of how the selling security holders may dispose of the shares covered by this prospectus.

We will not receive any of the proceeds from sales of common stock made by the selling security holders pursuant to this prospectus.

Our common stock is listed on the Nasdaq National Market under the symbol "MKTY." On April 19, 2005 the last reported sale price of our common stock was $3.92.

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The date of this prospectus is April 21, 2005.

This prospectus is part of a resale registration statement. The selling security holders may sell some or all of their shares in one or more transactions from time to time.

You should rely only on the information contained in this prospectus and, if applicable, any prospectus supplement. We have not authorized anyone else to provide you with different information. If anyone provides you with different or inconsistent information, you should not rely on it. You should assume that the information appearing in this prospectus and any prospectus supplement is accurate only as of the date of the documents containing the information.

Our Company is engaged primarily in the development and commercialization of Mobion^TM cord-free advanced portable power systems, through its subsidiary MTI MicroFuel Cells Inc. and in the design, manufacture and sale of high-performance test and measurement instruments and systems through its subsidiary MTI Instruments, Inc. Our Company also co-founded and retains a minority interest in Plug Power Inc., a designer and developer of on-site energy systems based on proton exchange membrane fuel cells that lists its common stock on the Nasdaq National Market under the symbol "PLUG." We refer to MTI Micro Fuel Cells Inc., MTI Instruments, Inc. and Plug Power Inc. in this prospectus as MTI Micro, MTI Instruments and Plug Power, respectively.

Our Company formed MTI Micro as a subsidiary on March 26, 2001 to develop direct methanol micro fuel cells, or DMFCs, for portable electronics. DMFCs generate energy through the chemical reaction of methanol and water in the presence of a catalyst. In December 2004, MTI Micro shipped its first low volume production of Mobion^TM fuel cell systems for use in hand held Radio Frequency Identification tag readers. Although this product shipment was an important milestone, the Company and MTI Micro recognize that significant technical, engineering, manufacturing, cost and marketing challenges remain before Mobion^TM fuel cells can become commercially viable or available.

MTI Instruments, formerly the Advanced Products Division of our Company, was incorporated as a subsidiary on March 8, 2000. MTI Instruments has three product groups: general gaging, semiconductor and aviation. These products consist of electronic, computerized general gaging instruments for position, displacement and vibration applications; semiconductor products for wafer characterization of semi-insulating and semi-conducting wafers; and engine balancing and vibration analysis systems for aircraft.

The mailing address of our principal executive offices is 431 New Karner Road, Albany, New York 12205, and our telephone number is (518) 533-2200. Our website can be found at www.mechtech.com. Information on this website is not incorporated by reference in this prospectus.

On December 22, 2004 we sold 1,261,829 shares of our common stock to Fletcher for an aggregate purchase price of $8 million (or $6.34 per share) in connection with Fletcher's exercise of an additional investment right. We originally issued such additional investment right along with shares of our common stock to Fletcher in a private placement transaction in January 2004. We amended the terms of this private placement in May 2004 (as amended, the 2004 Private Placement). We agreed to file with the SEC the Registration Statement, of which this prospectus is included, within ten business days of the issuance of the 1,261,829 shares of our common stock to permit Fletcher to resell such shares. On April 20, 2005, we issued 66,413 shares of our common stock to Fletcher. Our agreement with Fletcher requires that we issue such shares without any payment required on the part of Fletcher due to our failure to have the Registration Statement, of which this prospectus is included, declared effective by March 22, 2005 with respect to the 1,261,829 shares of our common stock sold to Fletcher. We agreed to file with the SEC the Registration Statement, of which this prospectus is included, to permit Fletcher to resell such shares.

After giving effect to the 1,261,829 shares of common stock we issued to Fletcher on December 22, 2004 (as well as all shares issued or to be potentially issued to Fletcher in connection with our failure to satisfy the registration requirement as discussed under "Financing Arrangements- Private Placement"), the 2004 private placement provided Fletcher additional investment rights to purchase up to an additional $20 million of our common stock at a price equal to $6.34 per share (subject to adjustment). This price has been reduced to $6.023 per share due to our failure to satisfy the registration requirement, and may be further reduced due to, among other things, continuing failure to satisfy such registration requirement. Any exercise of the additional investment rights could result in sales of our common stock at prices that are below the market price for our common stock at the time the investment right is exercised and could result in substantial dilution to our shareholders.

Our agreement with Fletcher also provides that Fletcher will receive additional shares of our common stock with respect to shares it already owns, and the exercise price and term relating to unexercised additional investment rights will be adjusted to the benefit of Fletcher, each upon the occurrence of certain events or circumstances, some of which are beyond our control, including:

In any event, 8,330,411 shares is the maximum number of shares of our common stock we may be required to issue to Fletcher, which amount includes the 1,418,842 shares issued on January 29, 2004, the 1,261,829 shares issued on December 22, 2004 and the 66,413 registration penalty shares issued on April 19, 2005.

Pursuant to our agreement with Fletcher, we have deposited 2,700,000 shares of Plug Power common stock in escrow to satisfy our potential obligation to sell such shares to Fletcher. The number of shares Fletcher may purchase and the exercise price for those shares is subject to fluctuation based on the market price of our common stock and the market price of Plug Power common stock. Accordingly, Fletcher may, in certain instances, purchase shares of Plug Power common stock either at a price below the fair market value of such shares, thereby reducing the value of our assets, or even if based on the market price of Plug Power shares, at a price at which we would not desire to sell such shares.

Pursuant to our agreement with Fletcher, we are obligated, within ten business days after the closing of the purchase of any additional shares by Fletcher pursuant to rights issued in connection with the 2004 Private Placement, to file a registration statement with the SEC covering the resale of all such shares. We are also obligated to cause each of those registration statements, including the Registration Statement of which this prospectus is included, to be declared effective not more than sixty (60) days after the closing of the purchase of such shares, or if the registration statement is reviewed by the SEC, not more than ninety (90) days after the closing of the purchase of such shares. If we fail to file the registration statements or become effective as set forth above, we must issue to Fletcher a number of additional shares to reflect the number of shares it would have acquired if its purchase price was based on the actual exercise price reduced by five percent for each month in which we fail to satisfy our obligations and adjust the exercise price for the additional investment rights to such lower price. In addition, such failure will result in an extension of the investment term for each day we fail to satisfy our registration obligations. The Company initially filed this Registration Statement on January 6, 2005 which was within ten business days after the closing of the purchase of additional shares by Fletcher on December 22, 2004. The 90-day deadline for this Registration Statement to be declared effective was March 22, 2005. We failed to meet the March 22, 2005 deadline and therefore were required to issue 66,413 additional shares of common stock to Fletcher without any payment required on its part and will be required to issue additional shares for each month that we continue to fail to satisfy such requirement.

Our cash requirements depend on numerous factors, including completion of our product development activities, our success in commercializing our Mobion^TM fuel cell systems and market acceptance of Mobion^TM fuel cells. Before we can successfully commercialize Mobion^TM fuel cells, we must complete a number of critical activities, and certain events must occur, including further product development; manufacturing process development; development of large-scale production capabilities; completion, refinement and management of our supply chain; completion, refinement, and management of our distribution channel; and further work on codes and standards critical to consumer acceptance, including the existence of federal regulations that permit methanol in the passenger compartment of passenger airplanes. All of this will be expensive and require significant capital resources that are well in excess of all current resources available to us. We believe that we will need to raise additional funds to achieve commercialization of Mobion^TM fuel cells. However, we do not know whether we will be able to secure additional funding, or funding on acceptable terms, to pursue our commercialization plans. We can raise funds in four ways: sale of certain of our Plug Power shares, sale of our Company's stock, sale of MTI Micro stock and sale of other assets. Pursuant to our amended agreement with Fletcher, we have deposited 2,700,000 shares of Plug Power common stock in escrow to satisfy our potential obligation to sell such shares to Fletcher. Fletcher may, in certain instances, purchase shares of Plug Power common stock at a price below the fair market value of the Plug Power shares at the time of purchase. In the event we are unable to have all the Plug Power shares released from escrow and Fletcher exercises its right to purchase the Plug Power shares, our ability to sell Plug Power shares will be reduced. In addition, although Fletcher has the right to invest up to an additional $20 million in our common stock, there can be no assurances that Fletcher will exercise such right. If Fletcher does not exercise its additional investment rights and the price of Plug Power common stock decreases significantly, we may be forced to increase the number of Plug Power shares sold, or reduce spending on micro fuel cell development. If additional funds are raised through the issuance of equity securities, the percentage ownership of our then current stockholders will be reduced. If adequate funds are not available to satisfy either short or long-term capital requirements, we may be required to limit operations in a manner inconsistent with our development and commercialization plans, which would materially adversely affect our business plans, prospects, results of operations and financial condition in future periods.

A large portion of revenues at MTI Instruments and MTI Micro for the next several years may come from government contracts. The loss of such contracts and the inability to obtain additional contracts could materially adversely affect our business plans, prospects, results of operations, cash flows and financial condition.

Direct methanol fuel cells, or DMFCs, are a new technology with many technical and engineering challenges still to be resolved. We cannot assure that we will be able to successfully resolve the technical and engineering challenges of DMFCs, or if we are successful, that such solutions will be commercially viable. Resolution of these technical and engineering issues requires substantial resources including financial, managerial and technical resources. We cannot assure that all the necessary resources will be available to the degree, and at the times, they are needed. If we are unable to successfully develop Mobion^TM fuel cells our business plans, prospects, results of operations and financial condition would be materially adversely affected.

Gillette and its Duracell division's commitments in the strategic alliance agreement and the other agreements entered into as a part of the strategic alliance transaction (including those commitments relating to joint development, distribution, marketing and investment) with MTI Micro are subject to early termination. Either MTI Micro or Gillette may terminate the strategic alliance agreement for cause at any time and at certain pre-defined periods of time, if technical milestones are not completed to the satisfaction of the other party. Gillette may also terminate the strategic alliance agreement prior to mass market commercialization if it decides not to establish fuel refill manufacturing capability.

The investment agreement with Gillette may be terminated if the strategic alliance agreement is terminated. In addition, any future investment by Gillette is conditioned upon MTI Micro reaffirming that the representations and warranties in the investment agreement are true as of the date of such investment. These representations and warranties include statements concerning ownership of intellectual property, and affirmations that MTI Micro is not infringing on the intellectual property of others and others are not infringing on MTI Micro's intellectual property. At this time we cannot determine whether MTI Micro will be able to make these statements as of the date of any potential future investments by Gillette, and the inability to make such statements could result in Gillette terminating the investment agreement.

Termination of MTI Micro's agreements with Gillette and its Duracell division would have material adverse consequences on MTI Micro's and the Company's business plans, prospects, results of operations and financial condition.

We cannot guarantee that MTI Micro will be able to develop commercially viable Mobion^TM fuel cell products on the timetable it anticipates, or at all. The commercialization of Mobion^TM fuel cell products requires substantial technological advances to improve the efficiency, functionality, reliability, cost, performance and environmental operating latitude of these systems and products and to develop commercial volume manufacturing processes for these systems and products. We cannot guarantee that MTI Micro will be able to develop the technology necessary for commercialization of Mobion^TM fuel cell products, or acquire or license the required technology from third parties. MTI Micro's failure to develop the technology necessary for high-volume commercialization of Mobion^TM fuel cells that are reliable, cost effective and present a value proposition to the customer will, in each case, have a material adverse effect on MTI Micro's and the Company's business plans, prospects, results of operations and financial condition.

Our cost to produce our current Mobion^TM fuel cell product exceeds the amount for which we can currently sell such product. If we are unable to reduce the costs of our Mobion^TM fuel cells, it will have a material adverse effect on MTI Micro's and the Company's business plans, prospects, results of operations and financial condition.

The commercialization of MTI Micro's Mobion^TM fuel cell products also depends upon MTI Micro's ability to significantly reduce the costs of these systems and products, since they are currently substantially more expensive than systems and products based on existing technologies, such as rechargeable batteries. We cannot assure that MTI Micro will be able to sufficiently reduce the cost of these systems and products without reducing their performance, reliability and longevity, which would adversely affect consumers' willingness to buy our systems and products and therefore materially adversely affect MTI Micro's and the Company's business plans, prospects, results of operations and financial condition.

We cannot guarantee that Gillette will be able to, or will choose to, develop, acquire or license commercially viable fuel refills for Mobion^TM fuel cell products on the timetable we anticipate, or at all. The commercialization of fuel refills for Mobion^TM fuel cell products requires substantial technological advances to improve the efficiency, functionality, reliability, cost and performance of these systems and products and to develop commercial volume manufacturing processes for these systems and products. Gillette's failure to supply fuel refills would have a material adverse effect on MTI Micro's and the Company's business plans, prospects, results of operations and financial condition.

Micro fuel cell systems for portable electronic devices represent an emerging market, and we do not know the extent to which our targeted distributors and resellers will want to purchase them and whether end-users will want to use them. The development of a viable market for our systems may be impacted by many factors that are out of our control, including:

If a viable market fails to develop or develops more slowly than we anticipate, we may be unable to recover the losses we will have incurred to develop our product and we may be unable to achieve profitability, each of which would have a material adverse effect on our business plans, prospects, results of operations and financial condition.

Our shipment of Mobion^TM fuel cells to Intermec in December 2004 was our first shipment of this product. The fuel cells shipped to Intermec may experience problems, including problems with reliability, run time, customer acceptance or safety. If the fuel cells shipped to Intermec experience failures, it could result in a material adverse effect on MTI Micro's and the Company's business plans and prospects.

Our Mobion^TM fuel cells are one of a number of alternative portable power energy solutions being developed as replacements for batteries, including thin film batteries, extended life lithium batteries and other types of fuel cell technologies. Technological advances in existing battery technologies or other fuel cell technologies may render our micro fuel cell systems obsolete and this would materially adversely affect our business plans, prospects, results of operations and financial condition.

To be commercially useful, certain of our Mobion^TM fuel cells must be integrated into products manufactured by original equipment manufacturers, or OEMs. We cannot guarantee that OEMs will manufacture appropriate products or, if they do manufacture such products, that they will choose to use Mobion^TM fuel cells. Any integration, design, manufacturing or marketing problems encountered by OEMs could adversely affect the market for Mobion^TM fuel cells, which could have a material adverse effect on MTI Micro's and the Company's business plans, prospects, results of operations and financial condition.

Current airline and FAA regulations and certain international laws, regulations and treaties limit the amount and concentration of methanol that any passenger can carry aboard passenger planes. We believe that these regulations must change for mass commercialization of Mobion^TM fuel cell products to be possible, although we are not aware of any pending changes. If these regulations do not change, it would materially adversely affect MTI Micro's ability to achieve mass commercialization of Mobion^TM fuel cell products and have a material adverse effect on MTI Micro's and the Company's business plans, prospects, results of operations and financial condition.

In recent years, hundreds of fuel cell patents have been issued worldwide. Many of these patents are broadly written and encompass basic and fundamental theories of how fuel cells should or could work. As we continue to develop our technology, our designs may infringe the patent or intellectual property rights of others. Whether our technology infringes or not, MTI Micro and our Company may become subject to lawsuits in which it is alleged that we have infringed the intellectual property rights of others. We may also commence lawsuits against others who we believe are infringing upon MTI Micro's rights. Involvement in intellectual property litigation could result in significant expense to MTI Micro and our Company, adversely affecting the development of sales of the challenged product or intellectual property and diverting the efforts of our technical and management personnel, whether or not such litigation is resolved in our favor. In the event of an adverse outcome as a defendant or plaintiff in any such litigation, MTI Micro and the Company may, among other things, be required to:

We cannot guarantee that MTI Micro or the Company would be successful in such development or acquisition or that such license would be available upon reasonable terms. Any such development, acquisition or license could require the expenditure of substantial time and other resources and could have a material adverse effect on our business plans, prospects, results of operations and financial condition.

The sale of Mobion^TM fuel cells exposes MTI Micro and the Company to potential product liability claims that are inherent in methanol and products that use methanol. Methanol is flammable and therefore potentially dangerous. Any accidents involving MTI Micro's products or other methanol-based products could materially impede widespread market acceptance and demand for DMFCs which could have a material adverse effect on MTI Micro's and the Company's business plans and prospects. In addition, MTI Micro may be held responsible for damages beyond the scope of its insurance coverage. We also cannot predict whether MTI Micro will be able to maintain its insurance coverage on acceptable terms. Damages beyond the scope of MTI Micro's insurance coverage or the inability to maintain insurance coverage on acceptable terms would have a material adverse impact on MTI Micro's and the Company's business plans, prospects, results of operations and financial condition.

As of December 31, 2004, we had an accumulated deficit of $66.624 million. For the year ended December 31, 2004, our net loss was $4.191 million, which includes a net gain of $3.626 million from sales of securities available for sale, and an operating loss of $13.592 million. We expect to continue incurring net losses from operations until we can produce sufficient revenues to cover costs. In order to achieve profitability, we must successfully achieve all or some combination of the following:

Furthermore, we anticipate that we will continue to incur losses until we can produce and sell our fuel cell systems on a large-scale and cost-effective basis. Even if we do achieve profitability, we may be unable to sustain or increase our profitability in the future. Failure to do so will have a material adverse effect on our business plans, prospects, results of operations and financial condition.

There are a number of other companies developing DMFCs. Some of our competitors may have better access to resources and capital than we do. Some of our competitors are much larger and have better access to manufacturing capacity, supply chains and distribution channels than we do. Some of our competitors may resolve technical or engineering issues before we do. Accordingly, one or more of our competitors may bring a mass commercial product to market before we do. In addition, one or more of our competitors may make a better or cheaper product than we can make. Failure to get to market with the best and most cost competitive DMFC product before our competitors would have a material adverse effect on our business plans, prospects, results of operations and financial condition.

To date, we have focused primarily on research and development and have limited experience manufacturing micro fuel cell systems on a commercial basis. We are continuing to develop our prototype manufacturing capabilities and processes. We do not know whether the processes we have developed thus far will be capable of supporting large-scale, mass manufacturing, or whether we will be able to develop the other processes necessary for large-scale, mass manufacturing of Mobion^TM fuel cells, that meet the requirements for cost, schedule, quality, engineering, design, production standards and volume requirements. Failure to develop or procure such manufacturing capabilities will have a material adverse effect on the Company's business plans, prospects, results of operations and financial condition.

We believe that we will need to enter into additional strategic relationships in order to complete our current product development and commercialization plans on schedule. If we are unable to identify or enter into a satisfactory agreement with potential partners, we may not be able to complete our product development and commercialization plans on schedule or at all, which would have a material adverse effect on our business plans, prospects, results of operations and financial condition. We may also need to scale back these plans in the absence of a partner, which would materially adversely affect our future business plans, prospects, results of operations and financial condition. In addition, any arrangement with a strategic partner may require us to issue a material amount of equity securities to the partner or commit significant financial resources to fund our product development efforts in exchange for their assistance or the contribution to us of intellectual property. Any such issuance of equity securities would reduce the percentage ownership of our then current shareholders, which would have a material adverse effect on our business plans, prospects, results of operations and financial condition.

We depend on third parties to supply many of the components of our Mobion^TM fuel cell systems. A supplier's failure to develop and supply components in a timely manner, or to develop or supply components that meet our quality, quantity or cost requirements, or our inability to obtain substitute sources of these components on a timely basis or on terms acceptable to us, would harm our ability to manufacture our fuel cell systems. In addition, to the extent that our supply partners use technology or manufacturing processes that are proprietary, we may be unable to obtain comparable components from alternative sources. Failure to do so will have a material adverse effect on our business plans, prospects, results of operations and financial condition.

In addition, platinum is a key material in our micro fuel cells. Platinum is a scarce natural resource and we are depending upon a sufficient supply of this commodity. While we do not anticipate significant near or long-term shortages in the supply of platinum, any such shortages would adversely affect our ability to produce commercially viable fuel cell systems or significantly raise our cost of producing our fuel cell systems.

We introduced our first Mobion^TM fuel cell product in limited quantities during December 2004. There may be technical or engineering challenges we have not anticipated, issues of reliability for our device, an inability for our device to be integrated into existing electronic devices, difficulties in obtaining materials or components, or problems with manufacturing or distribution, and many other problems that we have not, and perhaps could not anticipate. All of these issues could delay or prohibit further releases of additional Mobion^TM fuel cell products, which would have a material adverse effect on our business plans, prospects, results of operations and financial condition.

We have established aggressive product development and commercialization milestones and dates for achieving development goals related to technology and design improvements. We use these milestones to assess our progress toward developing commercially viable fuel cell systems. Delays in our product development will likely have a material impact on our commercialization schedule. If we experience delays in meeting our development goals or if our micro fuel cell systems exhibit technical defects or if we are unable to meet cost, performance or manufacturing goals, including power output, useful life and reliability, our commercialization schedule will be delayed. In this event, potential purchasers of our initial commercial systems may choose alternative technologies and any delays could allow potential competitors to gain market advantages. We cannot assure that we will successfully achieve our milestones in the future and the failure to achieve such milestones would have a material adverse effect on our business plans, prospects, results of operations and financial condition.

Our securities available for sale constitute investment securities under the Investment Company Act of 1940. In general, a company may be deemed to be an investment company if it owns investment securities with a value exceeding 40% of its total assets, subject to certain exclusions and exemptions.

Investment companies are subject to registration under, and compliance with, the Investment Company Act unless a particular exemption or safe harbor provision applies. If we were to be deemed an investment company, we would become subject to the requirements of the Investment Company Act. As a consequence, we would be prohibited from engaging in certain businesses or issuing certain securities, certain of our contracts might be voidable, and we might be subject to civil and criminal penalties for noncompliance.

Until 2001, we qualified for a safe harbor exemption under the Investment Company Act based upon the level of our ownership of shares of Plug Power and our influence over its management or policies. However, since we began selling shares of Plug Power, this safe harbor exemption is no longer available.

On December 3, 2001, we made an application to the SEC requesting that they either declare that we are not an investment company because we are primarily engaged in another business or exempt us from the provisions of the Investment Company Act. The Company amended this application on October 20, 2003. This application is pending. If our application is not granted, we will have to find another safe harbor or exemption that we can qualify for, which may include a one year safe harbor granted by the Investment Company Act, or become an investment company subject to the regulations of the Investment Company Act.

If we were deemed to be an investment company and could not find another safe harbor or exemption and failed to register as an investment company, the SEC could require us to sell our interests in Plug Power, until the value of these securities is reduced below 40% of total assets. This could result in sales of our securities in quantities of shares at depressed prices and we may never realize anticipated benefits from, or may incur losses on, these sales. Further, we may be unable to sell some securities due to contractual or legal restrictions or the inability to locate a suitable buyer. Moreover, we may incur tax liabilities when selling assets.

A primary asset of the Company is the shares of Plug Power common stock it owns. As of December 31, 2004, the Company owned 5,593,227 shares of common stock in Plug Power, which is a publicly traded company. Pursuant to our agreement with Fletcher, we deposited 2,700,000 shares of Plug Power common stock in escrow to satisfy our potential obligation to sell such shares to Fletcher. The number of shares Fletcher may purchase and the exercise price therefore are subject to fluctuation based on the market price of our common stock and the market price of Plug Power stock. Accordingly, Fletcher may, in certain instances, purchase shares of Plug Power common stock at a price below the fair market value of such shares. The market price of the Plug Power common stock may fluctuate due to market conditions and other conditions over which the Company has no control. Fluctuations in the market price of Plug Power's common stock may result in fluctuations in the market price of the Company's common stock which could result in the loss of part or all of a shareholder's investment.

Our success is partially dependent on the success of Plug Power. Plug Power, a developer of on-site electric power generation systems utilizing Proton Exchange Membrane, has stated that it is a development stage company and it does not know when or whether it will successfully complete research and development of commercially viable on-site energy products. If Plug Power is unable to develop commercially viable on-site energy products, it will not be able to generate sufficient revenue to become profitable. There is no assurance Plug Power will successfully develop a commercial product, or if it does, that it will do so in the time frames predicted. Plug Power's failure to successfully develop a commercial product could have a material adverse effect on our business plans, prospects, results of operations and financial condition.

Patent and trade secret rights are of material importance to us. No assurance can be given as to the issuance of patents or, if so issued, as to their scope. Patents granted may not provide meaningful protection from competitors. Even if a competitor's products were to infringe patents owned by us, or Plug Power, it would be costly to pursue an enforcement action and would divert funds and resources which otherwise could be used in operations. Furthermore, there can be no assurance that an enforcement action would be successful.

In addition to our patent rights, we also rely on treatment of our technology as trade secrets and upon confidentiality agreements. These agreements may be breached, and we may not have adequate remedies for any breach. Our inability to obtain patents, as well as to protect and enforce any patents that are issued as well as trade secrets, could have a material adverse effect on our business plans, prospects, results of operations and financial condition.

We continue to undergo rapid change in the scope and breadth of our operations as we advance the development of our micro fuel cell products. Such rapid change is likely to place a significant strain on our senior management team and other resources. We will be required to make significant investments in our engineering, logistics, financial and management information systems and to motivate and effectively manage our employees. Our business plans, prospects, results of operations and financial condition could be harmed if we encounter difficulties in effectively managing the budgeting, forecasting and other process control issues presented by such a rapid change.

As of December 31, 2004, First Albany Corporation owned approximately 9.53% percent of our outstanding common stock. A lock-up agreement that had prohibited it from selling its shares of our stock expired on December 20, 2004. Accordingly, these shares have the potential to be publicly traded, perhaps in large blocks. In addition, we agreed as part of the 2004 Private Placement with Fletcher to register for resale shares of our common stock owned by Fletcher. If a substantial amount of our common stock were sold in the public market, or even targeted for sale, it could have a material adverse effect on the market price of our common stock and our ability to sell common stock in the future.

The markets for high technology companies in particular have been volatile, and the market price of our common stock, which is traded on The Nasdaq National Market under the symbol MKTY, has been and may continue to be subject to significant fluctuations. Fluctuations could be in response to operating results, announcements of technological innovations or new products by us, Plug Power, or by our competitors, patent or proprietary rights developments, and market conditions for high technology stocks in general. In addition, the stock market in recent years has experienced extreme price and volume fluctuations that sometimes have been unrelated or disproportionate to the operating performance of individual companies. These market fluctuations, as well as general economic conditions, may adversely affect the market price of our common stock and the ability of stockholders to dispose of our common stock.

Certain industries in which we sell and intend to sell products, such as the energy and semiconductor industries are highly cyclical. In the future, our results may be subject to substantial period-to-period fluctuations as a consequence of the industry patterns of our customers, general or regional economic conditions, and other factors. These factors may also have a material adverse effect on our business plans, prospects, results of operations and financial condition.

If we raise additional funds through the sale of equity or convertible debt securities in either the Company or MTI Micro, current shareholders' percentage ownership will be reduced. In addition, these transactions may dilute the value of common stock outstanding. We may have to issue securities that may have rights, preferences and privileges senior to our common stock. We cannot assure that we will be able to raise additional funds on terms acceptable to us, if at all. If future financing is not available or is not available on acceptable terms, we may not be able to fund our future needs, which would have a material adverse effect on our business plans, prospects, results of operations and financial condition.

Our success will depend, in large part, upon our ability to attract, motivate and retain highly qualified scientists and engineers, as well as highly skilled and experienced management, sales and technical personnel. Competition for these personnel is intense, and there can be no assurance that we will be successful in attracting, motivating or retaining key personnel. Our success depends to a significant extent upon a number of key employees, including members of senior management. The loss of the services of one or more of these key employees could have a material adverse effect on our business plans, prospects, results of operations and financial condition.

This prospectus and any prospectus supplement contain forward-looking statements that involve risks and uncertainties. Any statements contained in this prospectus or any prospectus supplement that are not statements of historical fact may be forward-looking statements. When we use the words "anticipates," "plans," "expects," "believes," "should," "could," "may," "will" and similar expressions, we are identifying forward-looking statements. Forward-looking statements involve risks and uncertainties, which may cause our actual results, performance or achievements to be materially different from those expressed or implied by forward-looking statements. These factors include, among others:

Except as may be required by applicable law, we do not undertake or intend to update or revise our forward-looking statements, and we assume no obligation to update any forward-looking statements contained in this prospectus or any prospectus supplement as a result of new information or future events or developments. Thus, you should not assume that our silence over time means that actual events are bearing out as expressed or implied in such forward-looking statements.

We will receive no proceeds from the sale of the shares by the selling security holders. We will pay certain expenses related to the registration of the shares of common stock.

The shares of our common stock that are being registered for resale under this prospectus were issued in connection with Fletcher's exercise of an investment right issued in connection with the 2004 Private Placement that was exempt from the registration requirements of the Securities Act of 1933. Such shares are "restricted securities" under the Securities Act.

The selling security holders may from time to time offer and sell pursuant to this prospectus the respective number of shares of our common stock as are set forth opposite their names in the table below. The following table sets forth the name of each selling security holder and the following information, based on information they have provided to us, as of April 12, 2005:

The selling security holders may offer all, some or none of the common stock shown in the table. Because the selling security holders may offer all or some portion of the common stock, we have assumed for purposes of completing the last two columns that all shares of common stock offered hereby will have been sold by the selling security holders upon termination of sales pursuant to this prospectus.

None of the selling security holders has had any material relationship with us or our affiliates within the past three years.

The selling security holders, their affiliates and their successors, which term includes their transferees, pledgees or donees or their successors in interest, may offer and sell, from time to time, our common stock directly to purchasers (including pledgees) or through underwriters, broker-dealers or agents, who may act solely as agents or who may acquire shares as principals, who will act independently of us in making decisions with respect to the timing, manner and size of each sale, and who may receive compensation in the form of discounts, concessions or commissions from the respective selling security holders or the purchasers. Any shares sold through underwriters may be resold at different times in one or more transactions, including negotiated transactions, at fixed prices, at prevailing market prices at the time of sale, at prices related to such prevailing market prices, at varying prices determined at the time of sale, or at negotiated prices. These shares may be offered to the public through underwriting syndicates represented by one or more managing underwriters or may be offered to the public directly by one or more underwriters. Any public offering price and any discounts or concessions allowed or disallowed to be paid to dealers may be changed at different times. Such discounts, concessions or commissions as to any particular underwriter, broker-dealer or agent may be usual and customary or specifically negotiated in connection with their sales. Such sales may be effected in transactions:

At the time a particular offering of our common stock is made, if required, a supplement to this prospectus or, if appropriate, a post-effective amendment to the registration statement of which this prospectus is a part, will be distributed which will set forth the aggregate amount of common stock being offered, the names of the selling security holders, the respective purchase prices and public offering prices, the terms of the offering, including the name or names of any underwriters, broker-dealers or agents, any discounts, commissions and other terms constituting compensation from the selling security holders and any discounts, commissions or concessions allowed or reallowed or paid to broker-dealers, that such broker-dealer(s) did not conduct any investigation to verify the information set forth in this prospectus and other facts material to the transaction. Each broker-dealer that receives the common stock for its own account pursuant to this prospectus must acknowledge that it will deliver the prospectus and any prospectus supplement in connection with any sale of common stock. If required, this prospectus may be amended or supplemented on a continual basis to describe a specific plan of distribution.

In addition, upon receiving notice from a selling security holder that a donee, pledgee or transferee or other successor-in-interest intends to sell shares covered by this prospectus, we will file a supplement to this prospectus pursuant to Rule 424(b) under the Securities Act to identify the transferee. In connection with the 2004 Private Placement, we have agreed with the selling security holder to keep the registration statement of which this prospectus is a part effective until the earlier of (1) the later of (a) the second anniversary of the issuance of the last share that may be issued, or (b) such time as all shares issued or issuable to the selling security holder can be sold by the selling security holder or its affiliates within a three-month period without compliance with the registration requirements of Rule 144 of the Securities Act of 1933; or (2) the date that all shares covered by the registration statement have been sold by the selling security holder or its affiliates.

The aggregate proceeds to the selling security holders from the sale of our common stock offered by them hereby will be the purchase price of such shares of common stock less discounts and commissions, if any. Each of the selling security holders reserves the right to accept and, together with their agents from time to time, to reject, in whole or in part, any proposed purchase of common stock to be made directly or through agents. We will not receive any of the proceeds from this offering, but we will receive the exercise price if Fletcher exercises its additional investment rights to obtain additional shares of common stock, unless such exercise is effected on a net exercise basis.

Our outstanding common stock is included for quotation on the Nasdaq National Market.

In order to comply with the securities laws of certain jurisdictions, if applicable, the common stock may be sold in such jurisdictions only through registered or licensed brokers or dealers. In addition, in some states the common stock may not be sold unless it has been registered or qualified for sale or an exemption from registration or qualification requirements is available and is complied with.

The selling security holders and any underwriters, broker-dealers or agents that participate in the sale of the common stock may be deemed to be "underwriters" within the meaning of Section 2(a)(11) of the Securities Act of 1933. Any discounts, commissions, concessions or profit they earn on any resale of the shares may be deemed to be underwriting discounts and commissions under the Securities Act of 1933. Selling security holders who are deemed to be "underwriters" within the meaning of Section 2(a)(11) of the Securities Act of 1933 will be subject to the prospectus delivery requirements of the Securities Act of 1933. We will make copies of this prospectus available to the selling security holders and have informed them of their obligation to deliver copies of this prospectus to purchasers at or before the time of any sale of the shares. Neither the delivery of any prospectus, or any prospectus supplement, nor any other action taken by the selling security holders or any purchaser relating to the purchase or sale of the common stock under this prospectus shall be treated as an admission that any of them is an underwriter within the meaning of the Securities Act of 1933 relating to the sale of any shares. In connection with the 2004 Private Placement, the selling security holders have agreed not to engage in "short sales" (as defined in Rule 3b-3 of the Exchange Act) of common stock; however, selling security holders are not prohibited from engaging in any transaction in any stock index, portfolio or derivative in which the common stock is a component. Further, the selling security holders may (1) enter into transactions with brokers, dealers or others, who in turn may engage in sales, including short sales, of the shares in the course of hedging the positions they assume, (2) deliver shares to close out hedging transactions or derivative security positions or (3) loan shares to brokers, dealers or others that may in turn sell such shares. The brokers, dealers or others referred to in (1) above may engage in those transactions referred to in (1), (2) or (3) above through this prospectus. The selling security holders may enter into option or other transactions with broker-dealers or other financial institutions that require the delivery to the broker-dealer of the shares. The broker-dealer or other financial institution may then resell or transfer these shares through this prospectus. The selling security holders may also loan or pledge theirs shares to a broker-dealer or other financial institution. The broker-dealer or financial institution may sell the shares which are loaned or pursuant to a right to rehypothecate while pledged, or upon a default, the broker-dealer or other financial institution may sell the pledged shares by use of this prospectus. The broker-dealer or other financial institution may use shares pledged by the selling security holders or borrowed from the selling security holders or other to settle those sales or to close out any related open borrowings of shares, and may use securities received from the selling security holders in settlement of those derivatives to close out any related open borrowings of shares.

In addition, any securities covered by this prospectus which qualify for sale pursuant to Rule 144 of the Securities Act of 1933 may be sold under Rule 144 or any other available exemption rather than pursuant to this prospectus. There is no assurance that any selling security holder will sell any or all of the common stock described herein, and any selling security holder may transfer, devise or gift such securities by other means not described in this prospectus.

We entered into an agreement for the benefit of the selling security holders to register their common stock under applicable federal and state securities laws under particular circumstances and at specified times. We will pay all of our expenses, and the selling security holders will pay all of their expenses, incident to the offering and sale of the common stock.

We also have agreed to indemnify the selling security holders from certain damages or liabilities arising out of or based upon any untrue or alleged untrue statement of a material fact contained in, or material omission or alleged omission from, the registration statement of which this prospectus is a part, except to the extent the untrue or alleged untrue statement or omission or alleged omission was made in reliance upon written information furnished for inclusion herein by such selling security holders. The selling security holders may agree to indemnify any broker-dealer or agent that participates in transactions involving sales of the shares against certain liabilities, including liabilities arising under the Securities Act of 1933. The anti-manipulation rules of Regulation M under the Securities Exchange Act may apply to sales of common stock and activities of the selling security holders.

The following description of our common stock, together with the additional information we include in any applicable prospectus supplements, summarizes the material terms and provisions of the common stock that the selling security holders may offer under this prospectus. For the complete terms of our common stock, please refer to our certificate of incorporation and by-laws, which are filed as exhibits to the registration statement which includes this prospectus. New York corporate law may also affect the terms of these securities. Under our certificate of incorporation we are authorized to issue 75,000,000 shares of common stock, $1.00 par value per share. As of March 31, 2005, we had 30,610,213 shares of common stock outstanding held by approximately 15,900 stockholders of record.

Our common stock is listed on the Nasdaq National Market under the symbol "MKTY." Each share of our common stock entitles the holder to one vote on all matters submitted to a vote of stockholders, including the election of directors. All outstanding shares of common stock are fully paid and nonassessable and all shares of common stock offered and sold pursuant to this prospectus and any prospectus supplement, upon delivery, will be fully paid and nonassessable.

The transfer agent and registrar for our common stock is American Stock Transfer & Trust Company.

The validity of the common stock being offered hereby will be passed upon for us by Wilmer Cutler Pickering Hale and Dorr LLP, New York, New York.

The financial statements included in this prospectus for the years ended December 31, 2004, 2003 and 2002 have been so included in reliance on the report of PricewaterhouseCoopers LLP, an independent registered public accounting firm, given on the authority of said firm as experts in auditing and accounting.

Mechanical Technology Incorporated, ("MTI" or the "Company"), a New York corporation, was incorporated in 1961. The Company is primarily engaged in the development and commercialization of Mobion^TM cord-free advanced portable power systems, through its subsidiary MTI MicroFuel Cells Inc. ("MTI Micro"), and in the design, manufacture, and sale of high-performance test and measurement instruments and systems through its subsidiary MTI Instruments, Inc. ("MTI Instruments"). MTI also co-founded and retains a minority interest in Plug Power Inc. ("Plug Power") (Nasdaq: PLUG), a designer and developer of on-site energy systems based on proton exchange membrane fuel cells.

MTI's operations are conducted through MTI Micro, a majority-owned subsidiary, and MTI Instruments, a wholly-owned subsidiary. The Company currently owns approximately 89% of the outstanding common stock of MTI Micro and strategic partners, MTI Micro employees and MTI Micro board members own the remaining 11%. Officers, directors and employees of MTI and MTI Micro also hold options to purchase shares of MTI Micro common stock representing approximately 15% of MTI Micro's outstanding common stock on a fully diluted basis as of December 31, 2004. Such options either have vested or will vest within the next four years.

The Company formed MTI Micro as a subsidiary on March 26, 2001 to develop direct methanol micro fuel cells ("DMFCs") for portable electronics. DMFCs generate energy through the chemical reaction of methanol and water in the presence of a catalyst. In December 2004, MTI Micro shipped its first low volume production of Mobion^TM fuel cell systems for use in hand held Radio Frequency Identification ("RFID") tag readers. Although this product shipment was an important milestone, the Company and MTI Micro recognize that significant technical, engineering, manufacturing, cost and marketing challenges remain before Mobion^TM fuel cells can become commercially viable or available.

MTI Instruments, formerly the Advanced Products Division of our Company, was incorporated as a subsidiary on March 8, 2000. MTI Instruments has three product groups: general gaging, semiconductor and aviation. These products consist of electronic, computerized general gaging instruments for position, displacement and vibration applications; semiconductor products for wafer characterization of semi-insulating and semi-conducting wafers; and engine balancing and vibration analysis systems for aircraft. MTI Instruments' strategy is to continue to enhance and expand its product offerings with the goal of increasing market share and profitability.

MTI Micro designs and develops Mobion^TM fuel cells for portable power applications. MTI Micro plans to develop and deliver products to the industrial and military markets in 2006 and continues to work on its consumer product introduction which it anticipates will follow introduction of military market products. Nonetheless, significant challenges remain and MTI Micro's product development efforts continue to focus on the principal technological challenges of reliability, cost, manufacturability, energy density, size and operating latitudes. Specification targets for each of the technological issues vary depending on target markets and customer requirements.

A direct methanol micro fuel cell is a portable power source that converts the chemical energy of methanol into useable electrical energy. The Company believes Mobion^TM fuel cell systems could eventually have an energy density of five to ten times that of current Lithium-Ion ("Li-Ion") batteries. In addition, if and when Mobion^TM fuel cells are ready to be sold in mass-commercial markets, they should be able to power a wireless electronic device for longer periods of time than Li-Ion batteries without recharging/refueling, and be instantly refueled without the need for a power outlet or a lengthy recharge.

The Mobion^TM technology platform can be customized to provide portable power for a number of applications depending on the power level, required run time and size requirements.

During the fourth quarter of 2004, MTI Micro received a purchase order for 50 Systems and in December 2004, MTI Micro delivered 25 low volume production Mobion^TM fuel cell systems to a customer for integration into a hand held RFID tag reader. These fuel cell systems are expected to extend the operating time of the current battery in the RFID tag reader by two to three times, depending on usage patterns between refueling. Such fuel cells may also be instantly refueled. The product-related revenue associated with these 25 Systems is subject to warranty obligations and has been deferred.

Our initial product is a low volume production Mobion^™ fuel cell system ("System"), and is intended to offer instant cord-free recharging, using a replaceable fuel cartridge, and extended run times between charges from three to five times longer when compared to existing Li-Ion battery technology. Subsequent enhancements to our Systems are expected to expand the market opportunity for fuel cells by lowering the cost, decreasing operating and maintenance costs, increasing efficiency and improving reliability. This product is fueled by 100% methanol and can be recharged using a replaceable fuel cartridge. Subsequent derivations of the initial Mobion^™ platform are expected to enable products for applications in the mass commercial portable electronics industry.

The commercialization of MTI Micro's Mobion^TM fuel cell products also depends upon MTI Micro's ability to significantly reduce the costs of these systems and products, since they are currently substantially more expensive than systems and products based on existing technologies, such as rechargeable batteries. We cannot assure that MTI Micro will be able to sufficiently reduce the cost of these systems and products without reducing their performance, reliability and longevity.

MTI Micro has also developed prototype DMFC systems for military customers, including the RF Communications Division of Harris Corporation ("Harris"), a supplier of military communication devices, Army Research Laboratories, and other branches of the U.S. military. Pursuant to its initial agreement with Harris, MTI Micro delivered prototypes during 2003 and 2004. The Company also delivered prototypes of both its high and low power Mobion^TM fuel cells during 2004.

MTI Instruments

MTI Instruments is involved in the design, manufacture and sale of high-performance test and measurement instruments and systems. MTI Instruments' product development efforts are currently focused on a new calibrator for the PBS product line, and the enhancement to current PBS jet engine balancing systems and semiconductor products. MTI Instruments has three product groups: general gaging, semiconductor and aviation.

General Gaging - Gaging products include laser, fiber-optic and capacitance systems that measure a variety of parameters including displacement, position, vibration and dimension.

Listed below are selected products that MTI Instruments offers to its customers, including the Microtrakä II which features state-of-the-art laser triangulation technology for precise measurements of displacement, position, vibration and thickness.

Semiconductor - Semiconductor products include a complete line of non-contact measurement systems for the semiconductor industry. Systems range from manual to fully automated and measure thickness, bow, warp, resistivity, site and global flatness for all wafer materials.

The Company believes MTI Instruments is well positioned in the semiconductor market with a line of semiconductor products and an active presence in the market. Some products in this category include:

Aviation - Aviation products include vibration analysis and engine trim balance instruments and accessories for commercial and military jets. These products are designed to quickly pinpoint engine problems and eliminate unnecessary engine removals. Selected products in this area include:

MTI Instruments' largest customers include the U.S. Air Force and companies in the computer, electronic, semiconductor, automotive, aerospace, aircraft and bioengineering fields. In 2004, the U.S. Air Force accounted for $3.508 million or 46.7% of product revenues; in 2003, the U.S. Air Force accounted for $2.261 million or 40.8% of product revenues; in 2002, the U.S. Air Force accounted for $1.854 million or 34.6% of product revenues and ASML accounted for $.546 million or 10.2% of product revenues.

The Company entered into a financing transaction with Fletcher International, Ltd. ("Fletcher"), on January 29, 2004 and amended the terms of such transaction on May 4, 2004. As of the date of this Annual Report, Fletcher has purchased 2,680,671 shares of our common stock pursuant to such financing transaction. In addition, Fletcher has the right to purchase an additional $20 million of MTI's common stock, on one or more occasions, at a price of $6.023 (adjusted from $6.34) per share at any time prior to December 31, 2006. Fletcher also has the right to receive MTI shares without payment upon the occurrence of certain events, including but not limited to, failing to register for resale with the SEC shares purchased by Fletcher on the time table agreed to, a restatement of the Company's financial statements, change of control of the Company and issuance of securities at a price below Fletcher's purchase price. We have filed registration statements covering all of the shares purchased by Fletcher as of the date of the Annual Report and in the event of any additional purchases we are similarly obligated to file one or more registration statements covering the resale of such shares. Fletcher also has the right to purchase up to 2,700,000 shares of Plug Power common stock owned by us, potentially at a discount to the market price of such shares at the time of purchase. See "Business Transactions - Private Placement" for a more detailed discussion of the 2004 private placement.

We filed a registration statement on January 6, 2005 covering the resale of 1,261,829 shares of our common stock purchased by Fletcher on December 22, 2005. The Company failed to meet its contractual obligation with Fletcher to have such registration statement declared effective by March 22, 2005 and therefore under the terms of the Fletcher agreement we were required to issue additional shares of common stock to Fletcher and the exercise price for the Fletcher additional investment rights has been reduced to $6.023 per share. We are required to issue a number of shares of common stock that will result in Fletcher having effectively made its December 2004 investment at a price per share that is lower than the actual price paid. We refer to this reduced exercise price as the "deemed exercise price." More specifically, for each month during which we fail to satisfy the registration requirement, the deemed exercise price is reduced by $0.317 per share. As a consequence, on April 20, 2005 we issued 66,413 shares of common stock to Fletcher without any additional payment required by Fletcher, representing a deemed exercise price for Fletcher's December 2004 investment of $6.023 per share. Such deemed exercise price (as well as the exercise price for the Fletcher additional investment rights) will be further reduced by $0.317 per share, and we will be obligated to issue additional shares to Fletcher reflecting the new deemed exercise price, at the commencement of each additional month if on such date the above-referenced registration statement is not effective. In addition, we are required to file a registration statement covering the resale of any such additional shares issued to Fletcher.

MTI Micro is a majority-owned subsidiary of the Company. The Gillette Company ("Gillette") entered into a strategic alliance agreement with the Company on September 19, 2003, whereby MTI Micro, Gillette and Gillette's Duracell business unit will seek to jointly develop and commercialize micro fuel cell products to power high-volume, low-power, hand-held and mass market portable consumer devices. On August 18, 2004, the parties amended this agreement. Pursuant to the agreement, Gillette purchased 1,088,278 shares of MTI Micro common stock (representing approximately 2.97% of MTI Micro's outstanding common stock at the time of investment) at a price of $.92 per share for $1 million. In connection with this agreement, Gillette may make additional investments of up to $4 million subject to agreed milestones. For a more detailed discussion of the Gillette agreements, see "Business Transactions - Gillette".

As of December 31, 2004, FAC owned 2.9 million shares of the Company's common stock. MTI has no agreements with FAC concerning the disposition of such shares. Such shares are not registered securities; therefore, FAC may only sell the Company's shares pursuant to an effective registration statement or pursuant to an exemption from the registration requirements of the Securities Act of 1933. As long as FAC is not an affiliate of the Company, we believe that FAC may sell such shares pursuant to Rule 144(k) promulgated under the Securities Act and without respect to volume limitations pursuant to Rule 144(e).

MTI operates in two segments, the New Energy segment, which is conducted through MTI Micro and the Test and Measurement Instrumentation segment, which is conducted through MTI Instruments.

MTI Micro's business strategy is to develop a robust, reliable, manufacturable, cost-effective technology platform for Mobion^TM fuel cells and then use that technology to target military, vertical and horizontal consumer portable electronic device markets.

The potential military markets include extended life power sources for weapons, sensors and other mission critical devices for the war on terror. The potential vertical markets include industrial products, including portable communications devices, wireless scanners, hand-held inventory control devices and electronic healthcare products. The potential horizontal markets span a broad range of consumer mass-market portable electronic devices such as personal digital assistants ("PDAs"), cell phones, global positioning systems and digital cameras. Due to needs and characteristics of selected vertical markets, MTI Micro intends to enter targeted military and vertical markets prior to seeking entry into horizontal consumer markets.

The product specifications required to successfully penetrate MTI Micro's targeted markets vary depending on the device being powered. Weight, volume, peak power, environmental conditions, power duration and reliability are all factors that pose limiting thresholds on Mobion^TM fuel cell introduction and acceptance. Therefore, MTI Micro will target products that have specifications that intersect its technology roadmap at various stages of development, so that it can introduce products earlier, while building its supply chain, manufacturing capabilities and key Original Equipment Manufacturers ("OEMs") relationships.

As a result of discussions with its partners, government agencies, OEMs and others, MTI Micro has developed a commercialization strategy that consists of three overlapping phases (industrial, military and consumer) for market introduction of Mobion^TM fuel cells. This tiered approach is intended to enable MTI Micro to gradually penetrate each of its selected markets.

MTI Micro's management met all of its 2004 milestones culminating with MTI Micro's first Mobion^TM portable product shipment described above. To move the Company forward in 2005, the Company has set the following milestones for MTI Micro:

1. Deliver sensor power-pack prototypes to the U.S. military for testing during the second quarter;
2. Deliver a soldier radio power-pack prototype during the third quarter;
3. Develop an engineering prototype with a replaceable fuel refill for the consumer market, also during the third quarter;
4. Enter into an agreement with a lead customer/partner for the sensor product by the end of 2005; and
5. By the end of 2005, to enter into an agreement with a lead OEM for the joint development of a consumer product.

MTI Micro intends to sell to multiple industries and enable OEMs to enhance existing product offerings. MTI Micro's strategy is to team with appropriate players in each of its targeted markets. In parallel with its product introduction strategy, MTI Micro plans to leverage joint development activities and other formal partnerships with key component and subsystems suppliers. MTI Micro also intends to rely heavily on OEMs as distribution channels for early vertical product introductions. MTI Micro anticipates that the nature of these relationships will vary, and as MTI Micro continues to mature and move forward with its product commercialization, such relationships will become increasingly important.

The Gillette Company ("Gillette"). On September 19, 2003, MTI Micro entered into a strategic alliance agreement with Gillette whereby MTI Micro, Gillette and Gillette's Duracell business unit will seek to jointly develop and commercialize complementary micro fuel cell products to power future mass market, high volume and portable consumer devices.

The agreement provides for a multi-year exclusive partnership for the design, development and commercialization of a low power direct methanol micro fuel cell power system and a compatible fuel refill system. The strategic alliance agreement has three main components. First, Gillette and MTI Micro shall work together from a technical and marketing perspective to help create a market for micro fuel cells. Second, for a period of time, MTI Micro will receive a percentage of net revenues related to Gillette's sale of fuel refills for micro fuel cells. Third, Gillette has made, and may make in the future equity investments in MTI Micro. In addition, on September 19, 2003, Gillette made an initial $1 million investment in MTI Micro common stock and may make additional investments of up to $4 million subject to agreed milestones related to technical and marketing progress. As part of the agreement, MTI agreed to provide enough funding to MTI Micro to cover all operational costs for the first two years of the agreement. MTI satisfied this obligation in April 2004.

MTI Micro has not yet achieved the milestone necessary for the investment of the next $1 million in additional funds by Gillette. We do not expect this to occur, if at all, until late 2005 or 2006. Based on the current rate of progress with Gillette, we anticipate that Gillette will not invest the remaining $3 million until the end of 2008, if at all.

As part of the strategic alliance, MTI Micro transferred patents and other intellectual property related to fuel refill systems to Gillette, and Gillette transferred patents and other intellectual property related to DMFCs for hand held devices to MTI Micro. The patents and other intellectual property transferred to Gillette and any other intellectual property related to fuel refill systems for fuel cells for handheld devices, will be held in a licensing pool, which either party may license upon payment of a royalty fee. Both MTI Micro and Gillette will share in royalties related to the license of any intellectual property from the licensing pool.

The strategic alliance agreement is terminable by either party for cause at any time. In addition, either party may terminate the agreement without cause, if the other party does not meet the milestones set forth in the work plan through delivery of mutually agreed upon "deliverables" on milestones dates, as defined in the agreement and the work plan.

On August 18, 2004, MTI Micro entered into an amendment to the multi-year strategic alliance agreement. The amendment clarified the nature of the deliverables for the third and fourth milestones in the work plan; added an additional milestone; and changed the due dates for the third and fourth milestones. MTI Micro also granted a non-exclusive license to Gillette to any improvements by MTI Micro to intellectual property developed by Gillette.

MTI Micro is currently working collaboratively with Gillette to complete the third milestone which is due in May 2005.

For a more detailed discussion of the Gillette agreement, see "Business Transactions - Gillette"

Harris Corporation ("Harris"). In November 2002 and October 2003, MTI Micro entered into agreements with the RF Communications Division of Harris to develop micro fuel cell system prototypes for potential use in Harris' radios. Under the agreements, MTI Micro delivered to Harris DMFC system prototypes during the first and second quarters of 2003 and the second quarter of 2004. MTI continues to work with Harris to explore new opportunities for Mobion^TM products.

Flextronics International USA, Inc. ("Flextronics"). In November 2004, MTI Micro entered into a Design Services Agreement with Flextronics for design and development, pre-production design manufacturing engineering, prototyping and first article manufacturing of MTI Micro's Mobion^TM fuel cell systems. As part of this agreement, Flextronics will also provide services to MTI Micro pursuant to the Company's $3 million grant from the Department of Energy ("DOE").

Intermec Technologies Corporation ("Intermec"). In December 2004, MTI Micro delivered low volume production models of its Mobion^TM fuel cell system to Intermec for integration into a hand held Intermec RFID tag reader. MTI expects to deliver additional units in low volumes to Intermec during 2005 and provide service and assistance to Intermec as Intermec ships products containing Mobion^TM fuel cell systems to its customers. Intermec is currently working to install Mobion^TM fuel cell systems into its RFID handles.

Pursuant to the agreement with Intermec, MTI Micro agreed to warranty the Mobion^TM fuel cell systems shipped for a period of fifteen months. MTI Micro and Intermec are currently exploring whether there are follow-on applications to the RFID tag reader for Mobion^TM fuel cell systems, particularly for military applications.

E.I. du Pont de Nemours and Company ("DuPont"). MTI Micro entered into an agreement with DuPont in August 2001 to accelerate the development and commercialization of DMFCs for portable electronics and the agreement expired in July 2004. Under the expired agreement, the parties agreed to work together to jointly optimize DuPont's Nafion^® membrane technology for MTI Mobion^TM fuel cell systems. The Company has commenced discussions with DuPont regarding entering into a new development agreement that is similar to the expired agreement.

MTI Micro is also party to a supply agreement with DuPont providing that MTI Micro must purchase a majority of any membrane it purchases for its fuel cell from DuPont for a period of five years, commencing with the first commercial sale of fuel cells in volume by MTI Micro, if DuPont can meet best price and best quality in the industry. The supply agreement is in full force and effect. DuPont owns a minority equity interest in MTI Micro.

In 2004, MTI Micro was awarded, or received notification of award, for seven separate grants totaling a possible $4.2 million in funding between 2005 and 2007.

In February 2004, MTI Micro received a $200 thousand contract from the U.S. Army to build two DMFC prototypes to deliver 5 Watts of continuous power for 150 Watt hours and two DMFC prototypes to deliver 750 Milliwatts of power for 30 Watt hours. This contract was completed in December 2004.

In November 2003, the Company entered into a $250 thousand contract with Harris to build two prototype units of a DMFC hybrid power supply in a similar form factor of a military battery. The original agreement entered into in October 2003 was for $200 thousand and was modified in May 2004 increasing the contract to $250 thousand. This contract is ongoing.

In May 2004, MTI Micro announced that it had been awarded a three year, cost shared development contract from the DOE Office of the Hydrogen, Fuel Cells, and Infrastructure Technologies. The award is for $3 million in funding from DOE, which will be matched by a like amount from MTI Micro, for a total program of $6 million. MTI Micro will share portions of this award with its manufacturing partner, Flextronics, and a regulatory partner, The Methanol Institute. MTI Micro is using this award to fund development of its Mobion^TM fuel cells.

In October 2004, MTI Micro received two contracts to demonstrate energy density advantages and to quantify potential logistical advantages of its Mobion^TM fuel cells for the United States Armed Forces. The first award is administered by the Army Research, Development and Engineering Command and will total approximately $250 thousand over the period October 2004 through July 2005. The program includes the delivery of five integrated, hybrid DMFC systems to Special Operations Forces ("SOF"). These systems are targeted to provide continuous power to devices used by SOF and to deliver more than two times the energy of the battery currently used while fitting the same form factor. The second award, a Phase I Small Business Innovative Research contract from Marine Corp System Command, will provide $70 thousand over the period from October 2004 through March 2005, to analyze and report on current regulations and requirements necessary to field DMFCs and fuel refill systems. An optional three month period could raise the total value of the contract to $100 thousand. These contracts are ongoing.

During 2004, the New York State Energy and Research Development Authority ("NYSERDA") modified its original contract dated March 2002 to add $348 thousand for Phase III (Enhanced Energy Conversion Efficiency of Direct Methanol Fuel Cells - Validation and Testing). Phase III of the project supports DMFC technology development and commercialization efforts designed to move MTI Micro's DMFC technology to product launch readiness.

In April 2004, MTI Micro entered into a $200 thousand contract with Cabot Superior Micro Powders ("CSMP") to evaluate the performance of CSMP's membrane electrode assembly ("MEA") for portable fuel cell application.

In December 2004, MTI Micro was notified that it had been selected to receive a grant for $78 thousand from a New York State program administered by the State Department of Labor, which will fund training in business improvement processes designed to achieve the highest possible quality in processes and products.

In 2003, MTI Micro was awarded two contracts. One contract was for $200 thousand from NYSERDA for Phase II of its original contract to support projects designed to deliver energy, environmental and economic benefits to the citizens of New York State. The second contract was from a New York State program administered by the State Department of Labor for $41 thousand which funded training in Six Sigma®, a business improvement process designed to achieve the highest possible quality in processes and products. Activities have been completed under each of these contracts.

In 2002, MTI Micro was awarded a $500 thousand contract from NYSERDA to enhance and leverage the work under the Advanced Technology Program ("ATP") award. The NYSERDA award funded a year-long $1 million cost-shared research program targeting specific technical issues related to development of DMFCs as replacements for batteries in mobile phones and other handheld portable devices.

In 2001, MTI Micro was awarded a $4.6 million grant to develop advanced micro fuel cell systems from the ATP of the federal government's NIST. The NIST grant was part of a two-and-a-half year, $9.3 million cost-shared program to research and develop an advanced micro fuel cell system for portable electronics. The NIST grant was completed during 2004.

MTI Instruments' strategy in the Test and Measurement Instrumentation segment is to continue to enhance and expand its product offerings and market share and increase profitability.

In 2002, MTI Instruments was awarded two multi-year U.S. Air Force contracts for its PBS-4100 jet engine balancing systems. The first contract involved up to $3.1 million of sales for the Company in the years 2002 through 2004. Under the contract, the Company was to provide the Air Force with up to 53 PBS-4100 systems, 12 accessory kits and 42 amplifiers. The systems are key diagnostic tools in the maintenance of aircraft engines. As of December 31, 2004, MTI Instruments received $2.5 million in orders for approximately 80% of the contract's total potential value prior to its expiration on September 30, 2004.

The second contract to service and retrofit existing PBS-4100 systems with the latest diagnostic and balancing technology could potentially generate up to a total of $8.8 million in sales for the Company between the years 2002 and 2007. As of December 31, 2004, MTI Instruments had recorded $3.7 million in orders for approximately 42% of the five-year contract's total value.

MTI Instruments' latest product offerings include:

General Gaging.  In 2004, MTI Instruments introduced the MTI-2100 Fotonic™ Sensor - a "next generation" fiber-optic sensor for high-resolution, non-contact measurement of high frequency vibration and motion analysis. It replaced the MTI-2000 Fotonic Sensor. MTI Instruments also added the 1515 low-noise amplifier to its Accumeasure line. It is designed to meet the stringent requirements of brake rotor measurement applications in the automotive industry.

Semiconductors.  In 2004, MTI Instruments introduced the Proforma™ 300SA - a semi-automated tool for measuring thickness, total thickness variation, bow, warp, stress and flatness of 300mm wafers.

Aviation. In 2004, MTI Instruments introduced the PBS-3300 - a compact balancing and vibration diagnostics system for use in mobile test cells and distributed test stands. It is currently being used to balance the AGT 1500 gas turbine engine in the U.S. Army's M1A1 tank.

In the New Energy segment, MTI Micro has an experienced sales and marketing organization. Pursuant to the Gillette strategic alliance agreement, Gillette and the Company have commenced a joint marketing effort to gather market information, generate and refine product roadmaps, establish key relationships, gather customer and OEM feedback and launch products into the marketplace.  MTI Micro regularly evaluates its target market by conducting primary and secondary research and actively meeting and speaking with key industry suppliers and OEMs. In addition, MTI Micro representatives attend and speak at numerous conferences and trade shows for fuel cells, fuel cell development, batteries and other relevant target markets.

MTI Micro's Mobion^TM technology was recognized with three industry awards in 2004. MTI Micro received the 2004 Frost & Sullivan Technology Innovation Award for technological superiority in its industry, and also accepted an award from Scientific American in recognition for its business leadership. A third award came from Popular Science's Best of What's New as grand winner in the general innovations category.

In the Test and Measurement Instrumentation segment, MTI Instruments markets its products and services through a separate experienced marketing, sales and applications engineering staff. MTI Instruments' marketing and sales efforts are supported by a network of manufacturers' representatives, sales agents and distributors in domestic and foreign markets. In some cases, such as OEM accounts, MTI Instruments sells directly to its customers. To supplement these efforts, MTI Instruments also attends numerous trade shows in the areas of its concentration and uses product listings in appropriate media and directories and the Internet.

Comparisons of sales by class of products, which account for over 10 percent of the Company's consolidated sales, are shown below:

We anticipate that the primary competitive considerations in MTI Micro's markets will be compatibility of DMFC power sources with portable electronic devices, requirements for power pack size, energy content and reliability and price. We also believe the first company to successfully introduce a DMFC product in the commercial markets will have significant advantages over its competitors. Many of MTI Micro's competitors have much greater access to capital, resources, component supplies, manufacturing capacity and distribution channels than MTI Micro. In any event, because of the nature of product development, we cannot accurately determine our competitors' progress in developing DMFCs and whether such competitors' development efforts exceed MTI Micro's development efforts to date.

We analyze MTI Micro's competition based, in part, on two separate components of the DFMC market: (1) companies developing and providing DMFCs producing greater than three watts of energy, particularly companies focused on providing power devices for lap top computers; and (2) companies developing DMFCs producing less than three watts of energy. Within both of these categories, we have witnessed substantial changes during the last five years. Significant new competitors have emerged in Asia, Europe and in the United States. In addition, companies based in Japan, Korea, Germany and the United States have made patent filings in the U.S. for DMFC technologies.

Our primary focus in consumer markets is for hand held (less than 3 watt energy range) devices. Based on certain publicly available information, we believe MTI Micro's major competitors in the less than three watt energy range are large Asian companies, such as, Hitachi, Fijutsu and Toshiba. Both Toshiba and Hitachi have extensive patent portfolios and according to published reports, dedicated operations working on DMFCs. In addition both Hitachi and Toshiba have publicly introduced prototypes. Hitachi demonstrated DMFCs in personal digital assistant devices, or PDAs, and Toshiba demonstrated DMFCs in Bluetooth headsets and in MP3 players. We also compete with a number of smaller companies, such as, Medis Technologies Ltd., which announced a distribution and prototyping agreement with General Dynamics for military customers.

Based on certain publicly available information, we believe MTI Micro also faces significant competition is in the greater than three watt energy range, and in particular from companies focused on providing power for lap top computers. In this segment, we believe our major competitors are large Japanese, Chinese, Korean and American companies, including but not limited to Canon, Casio, Nanfu Battery, Fijutsu Laboratories, Hitachi, Matsushita Electric Works (Panasonic), NEC, Samsung, Sanyo, and Toshiba. Each of these companies has greater access to resources than we and, as the result of vertical integration, may have significant advantages in bringing product to market. We also consider Smart Fuel Cells AG ("Smart"), based in Germany to be a significant competitor. Smart has had product available in the market for three years and each introduction of new product demonstrated improvement in size, performance and reliability. In addition, Smart's fuel cells, which are significantly larger than MTI Micro's fuel cells, may be more consistent with power demands for certain military products.

MTI Instruments is subject to competition from several companies, many of which are larger than MTI Instruments and have greater financial resources. MTI Instruments' competitors include ADE Corporation, Sigma Tech Corporation, Corning Tropel Corporation, Chadwick-Helmuth (a business unit of Honeywell International, Inc.), ACES Systems and Keyence Corporation. While MTI Instruments has a share of its respective specialized market segments, it does not consider its share to be dominant within its industry. The primary competitive considerations in MTI Instruments' markets are product quality and performance, price and timely delivery. MTI Instruments believes that its employees, product development skills and reputation are competitive advantages.

MTI Instruments is subject to competition from several companies, many of which are larger than MTI Instruments and have greater financial resources. MTI Instruments' competitors include ADE Corporation, Sigma Tech Corporation, Corning Tropel Corporation, Chadwick-Helmuth (a business unit of Honeywell International, Inc.), ACES Systems and Keyence Corporation. While MTI Instruments has a share of its respective specialized market segments, it does not consider its share to be dominant within its industry. The primary competitive considerations in MTI Instruments' markets are product quality and performance, price and timely delivery. MTI Instruments believes that its employees, product development skills and reputation are competitive advantages.

MTI Micro focuses on the research and development of Mobion^TM direct methanol micro fuel cells for portable power applications. MTI Micro is developing a simplified DMFC technology platform intended to eliminate many of the pumps and valves found in traditional DMFC systems. MTI Micro's technology platform also focuses on using components and subsystems that use standard mass manufacturing practices. This technology platform is designed to permit MTI Micro to address the needs of applications with various power, duration and size requirements. DMFC development efforts are also focused on reliability, manufacturability, miniaturization and cost considerations, as well as compliance with codes and standards for DMFC systems. MTI Micro shipped its initial low volume production Mobion^TM fuel cell systems in late 2004. Continued improvement of the Mobion^TM product and development for follow-on products is ongoing. The Company and MTI Micro recognize that significant technical and engineering challenges remain before DMFCs can become commercially viable or available.

MTI Instruments conducts research and develops technology to support its existing products and develop new products. MTI Instruments' technology is generally an advancement of state-of-the-art in its industry. MTI Instruments seeks to achieve a competitive position by continuously advancing its technology rather than relying on patent protection. However, during 2004, MTI Instruments was awarded one patent supporting its semiconductor line.

During 2004, 2003 and 2002, the Company expended approximately $13.0, $8.3 and $6.6 million, respectively, on product development and research costs, including $4.0, $3.8 and $2.6 million, respectively, on partially funded research and development.

MTI Micro relies on a combination of patent (both national and international), trade secret, trademark and copyright protection to protect its intellectual property ("IP"). MTI Micro's strategy is to apply for patent protection for all necessary design requirements. Additionally, MTI Micro systematically analyzes the existing IP landscape for DMFCs to determine where the greatest opportunities for developing IP exist.

As of December 31, 2004, MTI Micro has filed 68 U.S. patent applications, 13 international patent applications and has been awarded 16 U.S. patents. MTI Micro has developed an extensive portfolio of patent applications in areas including fuel cell systems, components, controls, manufacturing processes and system packaging.

MTI Micro believes that the following patents are material to its business and that all of its patents may be significant to its future business activities.

In December 2000, MTI Micro licensed, on a non-exclusive basis, ten patent applications (eight issued and two abandoned) from Los Alamos National Laboratory ("LANL"). MTI Micro based its early DMFC systems work on these patents. MTI Micro has also licensed from LANL, on an exclusive basis, rights to European and Japanese counterpart applications for one LANL patent. Additionally, MTI Micro has licensing rights and obligations with respect to IP developed under agreements with Gillette, DuPont and other vendors.

In January 2005, MTI Micro and LANL modified the existing license such that it included in its entirety a total of nine issued U.S. patents. No changes were made to the license fees or royalties due under such license.

MTI Instruments relies primarily on trade secret law to protect its IP, however during 2004, MTI Instruments had one patent issued supporting its semiconductor product line.

Segment information is set forth in Note 22 - Geographic and Segment Information - of the Notes to Consolidated Financial Statements included in this prospectus.

On March 3, 2005, the Company entered into a settlement agreement for the outstanding claim brought against it by Donald R. Gililland, Sharon Gililland, Vernon Dunham and Jean Dunham, related to a facility lease. The claim was settled for $240 thousand to be paid by SatCon and $35 thousand to be paid by the Company. This settlement released the Company from any future obligations. The Company has accrued costs to settle this claim and the settlement of this claim is accounted for in the results of operations for the year ended December 31, 2004, and will be paid in the Company's first quarter 2005.

We filed a registration statement on January 6, 2005 covering the resale of 1,261,829 shares of our common stock purchased by Fletcher on December 22, 2005. The Company failed to meet its contractual obligation with Fletcher to have such registration statement declared effective by March 22, 2005 and therefore under the terms of the Fletcher agreement we were required to issue additional shares of common stock to Fletcher and the exercise price for the Fletcher additional investment rights has been reduced to $6.023 per share. We are required to issue a number of shares of common stock that will result in Fletcher having effectively made its December 2004 investment at a price per share that is lower than the actual price paid. We refer to this reduced exercise price as the "deemed exercise price." More specifically, for each month during which we fail to satisfy the registration requirement, the deemed exercise price is reduced by $0.317 per share. As a consequence, on April 20, 2005 we issued 66,413 shares of common stock to Fletcher without any additional payment required by Fletcher, representing a deemed exercise price for Fletcher's December 2004 investment of $6.023 per share. Such deemed exercise price (as well as the exercise price for the Fletcher additional investment rights) will be further reduced by $0.317 per share, and we will be obligated to issue additional shares to Fletcher reflecting the new deemed exercise price, at the commencement of each additional month if on such date the above-referenced registration statement is not effective. In addition, we are required to file a registration statement covering the resale of any such additional shares issued to Fletcher.

MTI Micro shipped its first low volume production Mobion^TM fuel cell systems in low volumes in December 2004. The Mobion™ fuel cell product was developed to deliver two important user benefits: instant cord-free re-charging, using a replaceable fuel cartridge, and extended run times between charges from three to five times longer when compared to existing Lithium- Ion ("Li-Ion") battery technology. In the development and qualification of this initial Mobion^TM product, MTI Micro became the world's first company to obtain micro fuel cell safety compliance certifications from Underwriter's Laboratory ("UL") and CSA International ("CSA"). MTI Micro also received United Nations ("UN") packaging certification and was deemed compliant by the United States Department of Transportation ("DOT") for worldwide cargo shipment of its methanol fuel cartridges. The Mobion™ power packs were manufactured by MTI Micro's manufacturing partner Flextronics, in San Jose, California. Flextronics is a leading electronics manufacturing services provider.

MTI Micro has also built a number of system prototypes that demonstrate size reductions and performance improvements, the ability to operate in any orientation and operate at a range of voltages. MTI Micro also uses laboratory systems to demonstrate and test advanced concepts and technology. MTI Micro has demonstrated laboratory systems operating on 100% methanol and another laboratory system has achieved an energy density of 250 Watt hours per liter ("Wh/l"), which is comparable to that of a typical prismatic Li-Ion battery. This lab system also achieved an energy density of 200 Watt hours per kilogram ("Wh/kg") on a weight basis, which surpasses the energy density of a typical prismatic Li-Ion battery. In addition, MTI Micro extracted 1 Wh/cc from methanol and 1.25 Watt hours per gram ("Wh/g") on a weight basis in lab systems. MTI Micro is working to evolve its laboratory systems to prototypes and then to products.

From inception through December 31, 2004, the Company has incurred net losses of $66.6 million and expects to incur losses as it continues micro fuel cell product development and commercialization. The Company expects that losses will fluctuate from year to year and that such fluctuations may be substantial as a result of, among other factors, equity financings, gains on sales of securities available for sale, the operating results of MTI Instruments and MTI Micro and the number of micro fuel cell products and prototypes produced.

Private Placement

On January 29, 2004, the Company issued to Fletcher International, Ltd., or Fletcher, in a private placement (1) 1,418,842 shares of our common stock for an aggregate purchase price of $10 million, or $7.048 per share, and (2) rights to purchase up to an additional $26 million of our common stock and in certain instances up to 3,000,000 shares of Plug Power Inc. (NASDAQ:PLUG) common stock owned by us, which rights are referred to herein as the additional investment rights.

On May 4, 2004, the Company amended its agreement with Fletcher. This agreement, as amended, ("the 2004 private placement") includes a change in the exercise price for the rights to purchase additional shares of MTI common stock to a fixed price of $6.34 per share from, in the original agreement, $7.048 per share until December 31, 2005 and the lesser of $7.048 per share or a variable price in 2006. The price is subject to adjustment upon the occurrence of certain limited events. The amended terms also include: (1) an increase in the rights to purchase additional shares of MTI common stock to $28 million from $26 million, (2) a reduction in Fletcher's right to purchase Plug Power common stock escrowed by the Company to a maximum of 2,700,000 shares from a maximum of 3,000,000 shares, (3) an extension of the exercise period for the right to purchase Plug Power common stock to one or more purchases between June 1, 2005 and December 31, 2006 from a one-time purchase in June of 2005, (4) an extension of MTI's ability to withdraw Plug Power common stock from escrow through December 31, 2006 instead of through June 30, 2005 and (5) an extension of the exercise period for the right to invest the first $8 million in MTI's common stock to any time prior to December 31, 2004 from any time prior to ninety business days after the effective date of MTI's registration statement.

On May 20, 2004, the SEC declared effective the Company's registration statement covering the resale of the 1,418,842 shares of common stock issued to Fletcher.

On December 22, 2004 the Company sold 1,261,829 shares of its common stock to Fletcher for an aggregate purchase price of $8 million (or $6.34 per share) in connection with Fletcher's exercise of an additional investment right. Pursuant to additional investment rights and after giving effect to the 1,261,829 shares of common stock the Company issued to Fletcher on December 22, 2004, Fletcher has the right, but not the obligation, to purchase, in a single purchase or multiple purchases, up to an additional $20 million of our common stock at any time prior to December 31, 2006 at a price per share equal to $6.023 (adjusted from $6.34), which date and price may be extended and adjusted, respectively, in the event that we have not satisfied our contractual obligations with respect to the registration for resale of common stock issued or issuable to Fletcher or upon the occurrence of certain events. Fletcher also has the right to purchase, in a single or multiple purchases, up to 2,700,000 shares of Plug Power common stock owned by us in certain circumstances. On January 6, 2005, we filed with the SEC a registration statement for the registration of the 1,261,829 shares of our common stock issued to Fletcher in order to permit Fletcher to resell such shares.

We filed a registration statement on January 6, 2005 covering the resale of 1,261,829 shares of our common stock purchased by Fletcher on December 22, 2005. The Company failed to meet its contractual obligation with Fletcher to have such registration statement declared effective by March 22, 2005 and therefore under the terms of the Fletcher agreement we were required to issue additional shares of common stock to Fletcher and the exercise price for the Fletcher additional investment rights has been reduced to $6.023 per share. We are required to issue a number of shares of common stock that will result in Fletcher having effectively made its December 2004 investment at a price per share that is lower than the actual price paid. We refer to this reduced exercise price as the "deemed exercise price." More specifically, for each month during which we fail to satisfy the registration requirement, the deemed exercise price is reduced by $0.317 per share. As a consequence, on April 20, 2005 we issued 66,413 shares of common stock to Fletcher without any additional payment required by Fletcher, representing a deemed exercise price for Fletcher's December 2004 investment of $6.023 per share. Such deemed exercise price (as well as the exercise price for the Fletcher additional investment rights) will be further reduced by $0.317 per share, and we will be obligated to issue additional shares to Fletcher reflecting the new deemed exercise price, at the commencement of each additional month if on such date the above-referenced registration statement is not effective. In addition, we are required to file a registration statement covering the resale of any such additional shares issued to Fletcher.

The additional investment rights provide Fletcher with the right, but not the obligation, to purchase, in a single purchase or multiple purchases, up to an additional $20 million of our common stock at any time prior to December 31, 2006 at a price per share equal to $6.023 (adjusted from $6.34), which date and price may be extended and adjusted, respectively, in the event that we have not satisfied our contractual obligations with respect to the registration for resale of common stock issued or issuable to Fletcher.

The table below illustrates the number of shares Fletcher would receive upon exercise of its $20 million additional investment right at a price per share equal to $6.023 (adjusted from $6.34) (such exercise price is subject to adjustment as described below under "Adjustment Provisions"). Further, the Company's 2004 private placement agreement with Fletcher provides that the maximum number of shares we could potentially issue to Fletcher is 8,330,411 shares.

The exercise price for the Plug Power investment right is $10,000,000 less the positive difference between $18,000,000 and the product of the sum of 2,680,671 shares multiplied by the prevailing price per share of our common stock on the date Fletcher elects to exercise such right, all divided by the quotient obtained by dividing 10,000,000 by the prevailing price of Plug Power common stock on the date Fletcher elects to exercise such right. As used herein, a prevailing price is the average of the daily volume-weighted average price per share of common stock during the sixty-business-day period ending three days prior to the date Fletcher elects to exercise such right, provided however that the price may not exceed the average of the daily volume-weighted average prices for any ten business days within such sixty-businessday period. Each of the above referenced per share exercise prices for the additional investment rights is subject to adjustment as described below under "Adjustment Provisions."

As a result of this exercise price calculation, we may be required to sell shares of Plug Power at a discount to prices we would otherwise obtain in sales at market prices. The table below illustrates such potential discounts based on assumed decreases in our stock price from $5.00 (which, for the purposes of this illustration, serves as an approximation of the price of our common stock), and an assumed price of Plug Power common stock at the time of exercise.

• a restatement of our financial results,
• a change in control of our company,
• a future issuance of our capital stock at a price less than $7.048 as it relates to the initial $10 million investment and $6.34 as it relates to all additional investments, or
• our failure to maintain the effectiveness of the registration statement relating to shares of our common stock that Fletcher owns or may acquire, as well as our failure to satisfy the other requirements relating to registration.

Restatement

In the event we restate any portion of our financial statements prior to January 29, 2005, or prior to the first anniversary of the closing of any additional investment, as the case may be, the exercise price for the additional investment rights may be adjusted to equal the average price (as defined) of our common stock sixty days after we restate our financial statements if the average price of the Company's common stock sixty days after a restatement is five percent lower than the average price three days before the restatement (a "Qualifying Restatement"). In addition, with respect to any investments made prior to the time of the restatement, Fletcher would receive additional shares of common stock such that all such investments will have been effectively made at such adjusted exercise price.

The following table illustrates the number of additional shares of common stock Fletcher would receive without any additional payment on its part in the event that the average price of the Company's common stock sixty days after a restatement (as defined) is $5.00 per share and $4.00 per share.

In response to comments received from the SEC staff of the Division of Corporation Finance, the Company previously amended its current annual report on Form 10-K for the year ended December 31, 2004 and its prior annual reports on Form 10-K for the years ended December 31, 2003 and December 31, 2002 to supplement the Company's financial statements with additional financial statements of SatCon Technology Corporation and Plug Power Inc., which were all previously publicly available, and to include certain summary financial information for both companies in the relevant notes to the Company's financial statements. In the Company's opinion, the above do not constitute restatements for purposes of its agreement with Fletcher.

In the event of a change of control of our company prior to sixty days after the expiration of the additional investment term, we may have to issue additional shares of our common stock to Fletcher and the additional investment rights (including the right to purchase the Plug Power shares) may be accelerated. If the consideration per share paid to our shareholders in the change of control transaction is less than twice the amount of the price per share paid by Fletcher for any of its investments pursuant to the agreement with Fletcher of the certificate of additional investment rights, then we must issue to Fletcher a number of shares of our common stock such that all of its investments will have been effectively made at a price per share equal to such per share change of control consideration multiplied by 0.5.

If, after December 31, 2004 and ending December 31, 2006, we issue any equity securities at a price below $7.048 as it relates to the initial $10 million investment and $6.34 as it relates to any additional investments which have been made, the exercise price for the additional investment rights shall be adjusted to provide Fletcher "weighted average" anti-dilution protection and we must issue to Fletcher a number of additional shares such that all prior investments will have been effectively made at such adjusted exercise price.

Registration Obligations

In the event we fail to satisfy our contractual obligations to register for resale shares of common stock issued or issuable to Fletcher, then we must issue to Fletcher a number of additional shares to reflect the number of shares it would have acquired if its purchase price was based on the actual exercise price reduced by five percent for each month in which we fail to satisfy our obligations and adjust the exercise price for the additional investment rights to such lower price. In addition, such failure will result in an extension of the investment term for each day we fail to satisfy our registration obligations. These registration obligations include, among other things, maintaining the effectiveness of registration statements.

As described above, we failed to satisfy the registration requirement for the 1,261,829 shares of common stock purchased by Fletcher on December 22, 2004.

The 2004 private placement also provides Fletcher certain other rights including, but not limited to, indemnification rights with respect to (1) breaches of representations, warranties and covenants contained in the agreements with Fletcher, and (2) misstatements in or omissions from the prospectus and the registration statement relating to shares of our common stock that Fletcher owns or may acquire.

In connection with the 2004 private placement, in February 2004 the Company paid placement fees, recorded in equity against the proceeds of the private placement, of $600 thousand to Chicago Investment Group, L.L.C. and issued a warrant to purchase 28,377 shares of the Company's common stock at an exercise price of $10.572 per share. The warrant may not be exercised until February 5, 2005 and expires on February 5, 2006. In connection with the amendment of the private placement, the Company paid advisory fees of $300 thousand to Citigroup Global Markets Inc.

On December 20, 2002, the Company and FAC completed a share exchange transaction whereby FAC exchanged 8 million shares of the Company's common stock owned by FAC for 2,721,088 shares of Plug Power common stock owned by the Company. As a condition of the exchange, FAC agreed not to sell its remaining shares of the Company's common stock for two years. This lock-up agreement expired in December 2004. As of December 31, 2004, FAC owns 2,916,040 shares of the Company's common stock or 9.53% of the Company's outstanding common stock.

As a result of the FAC transaction, the Company was no longer required to account for its remaining investment in Plug Power under the equity method of accounting. Under the equity method of accounting, the Company was required to report its proportionate share of Plug Power's financial results. During 2002, the Company recorded a non-cash gain on the exchange transaction of $8.006 million and recorded treasury stock at a non-cash cost of $13.606 million.

On September 19, 2003, MTI Micro, entered into a strategic alliance agreement with Gillette whereby MTI Micro, Gillette and Gillette's Duracell business unit will seek to jointly develop and commercialize micro fuel cell products to power high-volume, low-power, hand-held, mass market, portable consumer devices. On August 18, 2004, MTI Micro, entered into an amendment to the strategic alliance agreement with Gillette to clarify the allocation of deliverables in milestones 3 and 4; add an additional milestone; and change the due dates for MTI Micro's and Gillette's deliverables. MTI Micro also granted a non-exclusive license to Gillette to any improvements by MTI Micro to intellectual property developed by Gillette.

The agreement provides for a multi-year exclusive relationship for the design, development and commercialization of a low power direct methanol micro fuel cell power system and a compatible fuel refill system. Pursuant to the agreement, MTI Micro will focus on the development of the DMFC and Gillette will focus on the development of the fuel refill. In addition, both MTI Micro and Gillette transferred and licensed from each other certain IP assets, and both have the ability to earn royalties from that IP.

Gillette purchased 1,088,278 shares of MTI Micro common stock (representing approximately 2.97% of MTI Micro's outstanding common stock at the time of investment) at a price of $.92 per share for $1 million pursuant to an equity investment agreement. In addition, Gillette may make additional investments of up to $4 million subject to agreed milestones. The Company expects that multiple investments, subject to scheduled milestone completions, will occur through the end of 2008.

The Company also agreed to invest $20 million in MTI Micro before September 19, 2005 if other sources of funding are not available. Immediately prior to the Gillette transaction closing in September 2003, the Company invested $11 million ($7.4 million in cash and $3.6 million through the conversion of a loan receivable to equity) in MTI Micro. On October 29, 2003, Jeong Kim, a member of the board of directors of MTI Micro, purchased 1,088,278 shares of MTI Micro common stock at a price of $.92 per share for $1 million and on April 7, 2004, the Company invested $15 million into MTI Micro fulfilling its guaranty obligation.

On March 26, 2001, the Company formed MTI Micro and acquired substantially all of the outstanding stock of MTI Micro in exchange for contributing the assets of its micro fuel cell operations.

MTI Instruments, formerly the Company's Advanced Products Division, was incorporated as a subsidiary on March 8, 2000.

The Company and Edison Development Corp. ("EDC"), a subsidiary of DTE Energy Co., formed Plug Power as a joint venture in 1997, to further develop the Company's proton exchange membrane ("PEM") fuel cell technology. Plug Power designs and develops on-site energy systems based on PEM fuel cells. From 1997, when Plug Power was formed, through 1999, the Company contributed $20.7 million to Plug Power. Immediately prior to the Plug Power initial public offering ("IPO") in 1999, the Company purchased an additional 2,733,333 shares of Plug Power common stock at $7.50 per share for a total purchase price of $20.5 million.

On October 29, 1999, Plug Power consummated an IPO of its common stock on the Nasdaq National Market under the symbol "PLUG." The IPO price for the 6 million shares issued was $15 per share. Additionally, the underwriters of the IPO exercised their 900,000 shares over allotment at the IPO price.

As part of its program to restructure the Company and concentrate its limited financial resources on the development of its PEM fuel cell business, on October 21, 1999, the Company created a strategic alliance with SatCon Technology Corporation ("SatCon"). In exchange for Ling Electronics, Inc. and Ling Electronics, Ltd. (collectively, "Ling"), which were former subsidiaries of the Company, and the Company's cash support of approximately $7 million to SatCon, the Company received 1,800,000 shares of SatCon's common stock and warrants to purchase an additional 100,000 shares of SatCon's common stock. SatCon also received warrants to purchase 100,000 (300,000 post-split) shares of the Company's common stock.

On May 23, 2000, in connection with its alliance with SatCon, and to support its interest in SatCon, the Company provided cash support of $6 million to Beacon Power Corporation ("Beacon Power") and received preferred stock and

warrants to purchase common stock, and the right to receive additional warrants for common stock if there was an IPO of Beacon Power common stock. In August 2000, the Company exercised warrants for 12,000 shares of Beacon Power common stock. On November 17, 2000, Beacon Power completed its IPO. Immediately prior to its IPO, Beacon Power converted its preferred stock to common stock and completed a 2-for-1 stock split. In connection with the IPO, Beacon Power also granted the Company a warrant to purchase 1,333,333 shares of common stock at an exercise price of $2.25 per share. On December 20, 2000, the Company exercised its warrant for 1,333,333 shares on a cash-less exercise basis and received an additional 985,507 shares of Beacon Power common stock. On September 28, 2001, the Company received 544,148 shares of Beacon Power common stock pursuant to a pro rata distribution by SatCon. The Company recognized a gain of $827 thousand on this dividend distribution.

The Company began selling its holdings in Plug Power, SatCon and Beacon Power during 2001. During 2003, the Company sold all of its remaining holdings in SatCon and in December 2002, sold all of its remaining holdings in Beacon Power.

The Company's interest as of December 31, 2004 was:

(A) In connection with the Company's 2004 private placement, the Company has escrowed 2.7 million shares of Plug Power common stock.

The Company sold shares of the following securities and recognized gains (losses) and proceeds as follows for each of the years ended December 31:

The Company sold shares of the following equity holdings and recognized gains and proceeds as follows for each of the years ended December 31:

Proceeds from these securities' sales have been used to pay down debt, invest in subsidiaries and fund operations.

The Company leases office, manufacturing and research and development space in the following locations:

In management's opinion, the facilities are generally well maintained and adequate for our current needs and for expansion, if required.

At any point in time, the Company and its subsidiaries may be involved in various lawsuits or other legal proceedings. Such lawsuits could arise from the sale of products or services or from other matters relating to its regular business activities, compliance with various governmental regulations and requirements, or other transactions or circumstances. The Company does not believe there are any such proceedings presently pending which could have a material adverse effect on the Company's financial condition.

On September 9, 1998, Barbara Lawrence, the Lawrence Group, Inc. ("Lawrence") and certain other Lawrence-related entities ("Plaintiffs") initially filed suit in the Bankruptcy Court and the United States District Court for the Northern District of New York which were subsequently consolidated in the District Court, against First Albany Corporation ("FAC"), MTI, Dale Church, Edward Dohring, Beno Sternlicht, Alan Goldberg and George McNamee (Goldberg and McNamee are former Directors of the Company), Marty Mastroianni (former President and Chief Operating Officer of the Company), and 33 other individuals ("Defendants") who purchased a total of 820,909 (2,462,727 shares post split) shares of the Company's stock from the Plaintiffs. The case concerns the Defendants' 1997 purchase of MTI shares from the Plaintiffs at the price of $2.25 per share ($0.75 per share post split). FAC acted as Placement Agent for the Defendants in the negotiation and sale of the shares and in proceedings before the Bankruptcy Court for the Northern District of New York, which approved the sale in September 1997.

Plaintiffs claim that the Defendants failed to disclose material inside information concerning Plug Power, LLC to the Plaintiffs and therefore the $2.25 per share ($0.75 per share post split) purchase price was unfair. Plaintiffs are seeking damages of $5 million plus punitive damages and costs. In April 1999, Defendants filed a motion to dismiss the amended complaint, which was denied by the Bankruptcy Court. On appeal in October 2000, Plaintiffs' cause of action was dismissed by the United States District Court for the Northern District of New York. In November 2000, Plaintiffs filed an appeal of that dismissal with the United States Court of Appeals for the Second Circuit. In June 2002, the Second Circuit Court of Appeals reversed the District Court decision and remanded the case for further consideration of the Plaintiff's claims as motions to modify the Bankruptcy Court sale order. The Plaintiff's claims have now been referred back to Bankruptcy Court for such consideration. In September 2003, the Bankruptcy Court issued an order permitting Plaintiffs to conduct limited discovery concerning how First Albany formed an opinion about the Company's stock up until the date the Stock Purchase Agreement was executed.

The Company believes the claims have no merit and intends to defend them vigorously. The Company cannot predict the outcome of the claims nor reasonably estimate a range of possible loss given the current status of the litigation. Accordingly, no amounts have been reserved for this matter.

On March 5, 2005, the Company entered into a settlement agreement for the outstanding claim brought against it by Donald R. Gililland, Sharon Gililland, Vernon Dunham and Jean Dunham, related to a facility lease. The claim was settled for $240 thousand to be paid by SatCon and $35 thousand to be paid by the Company. This settlement released the Company from any future obligations. The Company has accrued costs to settle this claim and the settlement of this claim is accounted for in the results of operations for the year ended December 31, 2004, and was paid in the Company's first quarter of 2005.

MTI stock is traded on the Nasdaq National Market under the symbol MKTY. Set forth below are the highest and lowest prices at which shares of the Company's common stock have been traded during each of the Company's last two years.

As of April 20, 2005, the Company had approximately 557 holders of its $1.00 par value common stock. In addition, as of such date, there were approximately 15,400 beneficial owners of our common stock held in "street" name.

The payment of dividends is within the discretion of the Company's Board of Directors and will depend, among other factors, on earnings, capital requirements, and the operating and financial condition of the Company. The Company has never paid and does not anticipate paying dividends in the foreseeable future.

On January 29, 2004 the Company sold 1,418,842 shares of common stock and additional investment rights to Fletcher International, Ltd. in a private sale. On February 3, 2004, the Company filed a resale registration statement on Form S-3 for 6,384,790 shares of the Company's common stock issued or issuable pursuant to the Fletcher transaction. This registration statement became effective on May 20, 2004 with respect to the 1,418,842 shares issued to Fletcher. On May 4, 2004, the Company amended its agreement with Fletcher. On December 22, 2004, Fletcher exercised its right to purchase an additional 1,261,829 shares of the Company's common stock. On January 6, 2005, the Company filed a resale registration statement for the 1,261,829 shares of the Company's common stock issued to Fletcher. The Fletcher private placement was exempt from registration under the Securities Act pursuant to Section 4(2) thereof.

As described under the caption "Business Transactions", we issued 66,413 shares of common stock to Fletcher on April 20, 2005. Such issuance was exempt from registration under the Securities Act pursuant to Section 4(2) thereof.

None.

We are subject to the reporting requirements of the Securities Exchange Act of 1934 and in accordance with its requirements file annual and quarterly reports, proxy statements and other information with the Securities and Exchange Commission. These reports, proxy statements and other information may be inspected, and copies of these materials may be obtained upon payment of the prescribed fees, at the SEC's Public Reference Room, 450 Fifth Street, Suite 1300, N.W., Washington, D.C. 20549. Please call the SEC at 1-800-SEC-0330 for further information regarding the Public Reference Room. In addition, we are required to file electronic versions of these materials with the SEC through the SEC's Electronic Data Gathering, Analysis and Retrieval (EDGAR) system. The SEC maintains an internet site at http://www.sec.gov that contains reports, proxy and information statements and other information regarding registrants that file electronically with the SEC.

We have filed with the SEC a Registration Statement on Form S-1 under the Securities Act of 1933 with respect to the common stock offered by this prospectus. This prospectus and any prospectus supplement are part of that registration statement, but do not contain all of the information set forth in the Registration Statement and the exhibits and the schedules to the Registration Statement. For further information with respect to us and our common stock, you should read the Registration Statement, including its exhibits and schedules. Statements contained in this prospectus and any prospectus supplement as to the contents of any contract or other document referred to are not necessarily complete, and, with respect to any contract or other document filed as an exhibit to the Registration Statement, each such statement is qualified in all respects by reference to the corresponding exhibit. Copies of the Registration Statement and its exhibits are on file at the offices of the SEC and may be obtained upon payment of the prescribed fee or may be examined without charge at the SEC's Public Reference Room, at the address listed above, or via the EDGAR database.

The following table sets forth summary financial information regarding the Company for the periods as indicated: