UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 8-K

     PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934

                Date of Report (Date of earliest event reported):

                               September 24, 2004

                            ULTRALIFE BATTERIES, INC.
                            -------------------------
             (Exact name of registrant as specified in its charter)

                                    Delaware
                                    --------
         (State or other jurisdiction of incorporation or organization)

           0-202452                             16-132424013
           --------                             ------------
   (Commission File Number)         (I.R.S. Employer Identification No.)
   ------------------------         ------------------------------------

                 2000 Technology Parkway, Newark, New York      14513
                 ------------------------------------------------------
               (Address of principal executive offices)          (Zip Code)

                                 (315) 332-24100
                                 ---------------
              (Registrant's telephone number, including area code)


Check  the  appropriate  box  below  if the  Form  8-K  filing  is  intended  to
simultaneously  satisfy the filing obligation of the registrant under any of the
following provisions.

[ ] Written communications pursuant to Rule 425 under the Securities Act
    (124 CFR 240.425)

[ ] Soliciting material pursuant to Rule 14a-12 under the Exchange Act
    (124 CFR 240.14a-12)

[ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the
    Exchange Act (124 CFR 240.14d-2(b)

[ ] Pre-commencement communications pursuant to Rule 13e-4(c) under the
    Exchange Act (124 CFR 240.13e-4(c))




Item 7.01. Regulation FD Disclosure.

The Company will host an Analyst and Investor  Day for  institutional  investors
and analysts on September  28, 2004 at the company's  facilities in Newark,  NY.
Refer to the attached  Exhibit  99.1 for the entire text of the  release,  which
Exhibit is being furnished but not filed in accordance with Regulation FD.

Item 9.01. Financial Statements, Pro Forma Financials and Exhibits.

        (a)    Financial Statements of Business Acquired.

               Not applicable.

        (b)    Pro Forma Financial Information.

               Not applicable.

        (c)    Exhibits.

               99.1     Press Release dated September 24, 2004





                                    SIGNATURE

     Pursuant to the  requirements  of the Securities  Exchange Act of 1934, the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.

                                              ULTRALIFE BATTERIES, INC.

Dated: September 24, 2004                     By:   /s/ Robert W. Fishback
                                              ----------------------------------
                                                    Robert W. Fishback
                                                    Vice President Finance & CFO


                                Index to Exhibits

(99)   Additional Exhibits

       99.1     Press Release dated September 24, 2004