EXHIBIT 99.1

   Ultralife Batteries, Inc. Receives $1.6 Million Order for HiRate
                            Military Cells

    NEWARK, N.Y.--(BUSINESS WIRE)--Sept. 8, 2004--Ultralife Batteries,
Inc. (NASDAQ: ULBI) today announced the receipt of an order valued at
over $1.6 million for its HiRate(R) D-size lithium cells from one of
its U.S. battery assembly customers, a prime contractor to the U.S.
Army. Ultralife announced numerous orders for the same product from
this customer in 2003. The cells are used in batteries for Thermal
Weapon Sights, which are used for surveillance, target acquisition and
engagement. The batteries will be supplied to the U.S. Army
Communications and Electronics Command. Cell deliveries are expected
to begin in late September and be completed by the end of the year.
    John Kavazanjian, Ultralife's president and chief executive
officer, said, "The Defense Department has fielded tens of thousands
of advanced infrared thermal weapon sights and plans to field
thousands more for use by the Army, Marine Corps and Special
Operations Forces. This increasing demand for batteries using our
cells affirms our position as the industry leader in the design and
production of safe, high-energy lithium-manganese dioxide cells and
batteries."
    Ultralife's D-size, non-rechargeable lithium cells, which provide
significantly more energy than competitors' lithium-sulfur dioxide
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 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-9001/2000 certified.

    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 Ultralife HiRate(R) are registered trademarks of
Ultralife Batteries, Inc.

    CONTACT: Company Contact:
             Ultralife Batteries, Inc.
             Peter 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