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 22, 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 22, 2004



Item 9. Regulation FD Disclosure.

The Company in cooperation with one of its distributors, has received an order
valued at approximately $1.5 million to supply custom lithium ion batteries and
chargers to Cubic Defense Applications, the defense segment of Cubic Corporation
(AMEX: CUB). 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 22, 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 22, 2004



                                       3

                                                                  Exhibit 99.1

  Ultralife Batteries, Inc. Receives $1.5 Million Order to Supply Lithium Ion
Batteries and Chargers to Cubic Corporation for Advanced Combat Training System

     NEWARK, N.Y.--(BUSINESS WIRE)--April 22, 2004--Ultralife Batteries, Inc.
(NASDAQ: ULBI), in cooperation with one of its distributors, has received an
order valued at approximately $1.5 million to supply custom lithium ion
batteries and chargers to Cubic Defense Applications, the defense segment of
Cubic Corporation (AMEX: CUB). The order is for production quantities of custom
lithium ion rechargeable batteries and chargers for Cubic's Weapons Effects
Simulation land-based combat training system for the Canadian Armed Forces.
Battery and charger deliveries are scheduled to begin this June and continue
through October 2005.
     John D. Kavazanjian, Ultralife's president and chief executive officer
said, "This order further reinforces Ultralife's leadership role as a supplier
of advanced lithium and lithium ion batteries and chargers for use in critical
military systems. It also illustrates the range of customers with whom we have
relationships in our military business - U.S. governmental entities, U.S.
defense contractors and military distributors, both domestic and international.
Many of the military batteries we have developed and produced are also used in
commercial applications, affording us the opportunity to expand our customer
base for these products."
     Powered by Ultralife's rugged, custom-engineered 14-volt, six ampere-hour
lithium ion batteries and multiple-bay chargers, the Weapon Effects Simulation
system features a fully integrated Direct-Fire Weapons Effects Simulation system
that includes Cubic's new Precision Combat Training System and advanced
software-based exercise control and after-action review technology.

     About Ultralife Batteries, Inc.

     Ultralife is a leading developer, manufacturer, and marketer of standard
and customized lithium primary (non-rechargeable), lithium ion and lithium
polymer rechargeable batteries. Ultralife's high-energy batteries use advanced
lithium technology and are used in military, industrial and consumer portable
electronic products. Through its range of standard products and ability to
customize for a wide range of applications, Ultralife is able to provide the
next generation of battery solutions. OEM, retail and government customers
include Energizer, Kidde Safety, Philips Medical Systems, Radio Shack and the
national defense agencies of the United States and United Kingdom, among others.
     Ultralife's headquarters, principal manufacturing and research facilities
are in Newark, New York, near Rochester. Ultralife (UK) Ltd., a second
manufacturing and research facility, is located in Abingdon, U.K. Both
facilities are ISO-9001 certified.

     About Cubic Defense Applications Group

     The Cubic Defense Applications group, one of Cubic's two major segments,
provides realistic combat training systems for military forces as well as
simulation training, force transformation assistance, educational services,
operations and maintenance, and manufacturing services. The group also supplies
products and systems for C4ISR (Command, Control, Communications, Computers,
Intelligence, Surveillance & Reconnaissance) applications, search and rescue
avionics, and radio communications for military and civil markets.
     For more information about Cubic, see the company's web site:
www.cubic.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) is a registered trademark of Ultralife Batteries, Inc.

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