Power Management Patent Granted to O2Micro(R)

O2Micro(R) International Limited (NASDAQ:OIIM), a
leading supplier of innovative power management, and security
components and systems for the Computer, Consumer, Industrial, and
Communications markets, was granted 18 claims under United States
patent number 6,977,482 for its Selector Circuit for Power Management
in Multiple Battery Systems; issued December 20, 2005.
   This technology allows integration of the battery charger and
selector circuits to reduce PCB area and component cost in portable
electronic devices with multiple batteries. Portable electronic
devices include notebook computer, cell phone, PDA (Personal Digital
Assistant), PMP (Portable Media Player) and MP3 player applications.
   Alex Hartular, vice president of O2Micro's Intelligent Power
business unit, stated, "This innovation simplifies the power
management system, lowers system cost and enhances power supply safety
and battery life."

   About O2Micro

   Founded in April 1995, O2Micro develops and markets innovative
power management, and security components and systems for the
Computer, Consumer, Industrial, and Communications markets. Products
include Intelligent Lighting, Battery Management, Power Management,
SmartCardBus(R) and Security products, such as VPN/Firewall system
solutions.
   O2Micro International maintains an extensive portfolio of
intellectual property with 3,348 patent claims granted, and over 5,000
more pending. The company maintains offices worldwide. Additional
company and product information can be found on the company website at
www.o2micro.com.

   O2Micro, the O2Micro logo, SmartCardBus and combinations thereof
are registered trademarks of O2Micro.

   Statements made in this release that are not historical, including
statements regarding O2Micro's or management's intentions, hopes,
beliefs, expectations, representations, projections, plans or
predictions of the future, are forward-looking statements within the
meaning of the Private Securities Litigation Reform Act of 1995. Such
statements involve risks and uncertainties that may cause actual
results to differ materially from those set forth in these statements.
Factors that could cause actual results to differ materially include
risks and uncertainties such as reduced demand for products of
electronic equipment manufacturers which include O2Micro's products
due to adverse economic conditions in general or specifically
affecting O2Micro's markets, technical difficulties and delays in the
developments process, and errors in the products. You are also
referred to the Form F-1 in connection with the company's initial
public offering in August 2000, Form F-3 in connection with the
company's public offering in November 2001, and the annual reports on
Form 20-F, which identify important risk factors that could cause
actual results to differ from those contained in the forward-looking
statements. The company assumes no obligation to update or revise any
forward-looking information, whether as a result of new information,
future events or otherwise.