Exhibit 99.1

        Ultralife Announces Resignation of Joseph N. Barrella,
          Senior Vice President of New Business Development

    NEWARK, N.Y.--(BUSINESS WIRE)--Oct. 11, 2004--Ultralife Batteries,
Inc. (NASDAQ: ULBI) announced that Joseph N. Barrella, senior vice
president of new business development, has resigned to pursue other
business opportunities. His resignation is effective immediately. Mr.
Barrella was one of the founders of the company and served on
Ultralife's board of directors until June of this year.
    "As a pioneer in the development and commercialization of lithium
batteries, Joe made numerous contributions to the evolution of
Ultralife into the profitable, power source solutions company that it
is today," said John D. Kavazanjian, president and chief executive
officer. "On behalf of our board of directors and employees, we
greatly appreciate his many years of service at the company. His
participation and contributions will be missed by all of us."
Kavazanjian said that Barrella's former responsibilities will be
assumed by Patrick R. Hanna, Jr., vice president of corporate business
strategy. "The merging of our new business development and strategic
planning activities under Pat is a logical move that we expect will be
accomplished in an expeditious manner," added Kavazanjian.

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

    Ultralife is a registered trademark of Ultralife Batteries, Inc.

    CONTACT: Company Contact:
             Ultralife Batteries, Inc.
             Peter F. 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