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):

                                 April 14, 2004

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

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

         0-20852                                         16-1387013
         -------                                         ----------
(Commission File Number)                    (I.R.S. Employer Identification No.)
------------------------                    ------------------------------------

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

                                 (315) 332-7100
                                 --------------
              (Registrant's telephone number, including area code)


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Item 7. 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  April 14, 2004



Item 9. Regulation FD Disclosure.

The Company will report its first quarter 2004 results for the period ended
March 27, 2004 before the market opens on Thursday, April 29, 2004. 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.





                                    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: April 14, 2004                 By:      /s/Peter F. Comerford
                                               Peter F. Comerford
                                               Vice President - Administration &
                                               General Counsel



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                                Index to Exhibits

(99)     Additional Exhibits

99.1     Press Release dated April 14, 2004



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