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

                                    FORM 8-K

                                 Current Report
     PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

                Date of Report (Date of earliest event reported):

                                October 20, 2005

                            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)


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 (17
     CFR 230.425)

|_|  Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
     240.14a-12)

|_|  Pre-commencement communications pursuant to Rule 14d-2(b) under the
     Exchange Act (17 CFR 240.14d-2(b)

|_|  Pre-commencement communications pursuant to Rule 13e-4(c) under the
     Exchange Act (17 CFR 240.13e-4(c))


                                       1

Item 7.01. Regulation FD Disclosure. Ultralife Batteries, Inc. (the "Company") will report its third quarter 2005 results for the period ended October 1, 2005 before the market opens on Thursday, November 3, 2005. The Company's press release is attached as Exhibit 99.1 to this Form 8-K, and the information set forth therein is furnished under Item 7.01. 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 October 20, 2005. 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: October 20, 2005 By: /s/Robert W. Fishback -------------------------------- Robert W. Fishback Vice President of Finance & CFO 2

INDEX TO EXHIBITS (99) Additional Exhibits 99.1 Press Release dated October 20, 2005. 3

                                                                    Exhibit 99.1

                     Ultralife Batteries to Report
Third Quarter Results on November 3, 2005; Investor Conference Call to
             be Webcast at Ultralife Batteries' Web Site

    NEWARK, N.Y.--(BUSINESS WIRE)--Oct. 20, 2005--Ultralife Batteries,
Inc. (NASDAQ: ULBI) will report its third quarter 2005 results for the
period ended October 1, 2005 before the market opens on Thursday,
November 3, 2005. Ultralife management will host an investor
conference call at 10:00 AM ET also on November 3, 2005. Investors are
invited to access a live webcast of the conference call in the
Investor Info - Event Calendar section of the company's website:
http://investor.ultralifebatteries.com. A replay of the webcast will
be available shortly after the call at the same location and will be
archived for 90 days.

    About Ultralife Batteries, Inc.

    Ultralife is a global provider of power solutions for diverse
applications. The company develops, manufactures and markets a wide
range of non-rechargeable and rechargeable batteries, charging systems
and accessories for use in military, industrial and consumer portable
electronic products. Through its range of standard products and
engineered solutions, Ultralife is able to provide the next generation
of power systems. Industrial, retail and government customers include
General Dynamics, Philips Medical Systems, General Motors, Energizer,
Kidde Safety, Lowe's, Radio Shack and the national defense agencies of
the United States, United Kingdom and Germany, among others.
    Ultralife's headquarters, principal manufacturing and research
facilities are in Newark, New York, near Rochester. Ultralife (UK)
Ltd., a second manufacturing facility, is located in Abingdon,
England. Both facilities are ISO-9001 certified.

    Detailed information on Ultralife is available at the Company's
web site, www.ultralifebatteries.com.



    CONTACT: Ultralife Batteries, Inc.
             Robert W. Fishback, 315-332-7100
             bfishback@ulbi.com
             or
             Investor Relations:
             Lippert/Heilshorn & Associates, Inc.
             Jody Burfening, 212-838-3777
             jburfening@lhai.com
             or
             Media:
             Lippert/Heilshorn & Associates, Inc.
             Chenoa Taitt, 212-201-6635
             ctaitt@lhai.com