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):

                                 August 17, 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") announced that it has received a $3.5 million order for its HiRate(R) D-size lithium cells from a U.S. battery assembler for thermal sight batteries to be supplied to the U.S. Defense Department. Cell deliveries are expected to begin in the third quarter and be completed in the first quarter of 2006. 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 August 17, 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: August 17, 2005 By: /s/Peter F. Comerford --------------------- Vice President of Administration & General Counsel 2

INDEX TO EXHIBITS (99) Additional Exhibits 99.1 Press Release dated August 17, 2005. 3

                                                                    Exhibit 99.1

Ultralife Batteries Receives $3.5 Million Order for HiRate Military Cells

    NEWARK, N.Y.--(BUSINESS WIRE)--Aug. 17, 2005--Ultralife Batteries,
Inc. (NASDAQ:ULBI) has received a $3.5 million order for its HiRate(R)
D-size lithium cells from a U.S. battery assembler for thermal sight
batteries to be supplied to the U.S. Defense Department. Cell
deliveries are expected to begin in the third quarter and be completed
in the first quarter of 2006.
    John D. Kavazanjian, Ultralife's president and chief executive
officer, said, "Ultralife is well positioned to satisfy the growing
demand for thermal weapon sight batteries. The U.S. Defense Department
has fielded 25,000 thermal weapon sights to the U.S. Army, Marine
Corps and Special Operations Forces to date and plans to field
thousands more. Once we complete qualification under our contract with
the Defense Department, we will begin supplying BA-5347 batteries
directly to the military."
    Ultralife's D-size, non-rechargeable lithium-manganese dioxide
cells, which provide more energy than competitors' cells, are used in
a wide range of military and industrial applications where high
energy, long shelf life, safety and high reliability are required.

    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
about Ultralife is available at www.ultralifebatteries.com.

    This press release may contain forward-looking statements based on
current expectations that involve a number of risks and uncertainties.
The potential risks and uncertainties that could cause actual results
to differ materially include: worsening global economic conditions,
increased competitive environment and pricing pressures, disruptions
related to restructuring actions and delays. Further information on
these factors and other factors that could affect Ultralife's
financial results is included in Ultralife's Securities and Exchange
Commission (SEC) filings, including the latest Annual Report on Form
10-K.
    Detailed information on Ultralife is available at the Company's
web site, www.ultralifebatteries.com.
    Ultralife(R) and HiRate(R) are registered trademarks of Ultralife
Batteries, Inc.

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