02MICRO'S BATTERY FUEL GUAGE CIRCUIT RECEIVES PATENT
O2Micro’s Battery Fuel Gauge Circuit Receives Patent
GEORGE TOWN, Grand Cayman, June 17, 2009. O2Micro® International Limited (NASDAQ®: OIIM;
SEHK: 0457), a leading supplier of innovative power management and security components, was issued
17 claims under United States patent number 7,531,989 for its Battery Fuel Gauge Circuit.
This patented circuit measures the State-of-Charge (SOC) or capacity of a rechargeable battery pack.
This patent simultaneously enables an accurate and cost effective circuit for measuring battery pack SOC
for users to gauge the ability to complete their tasks. For example: notebook, cell phone, digital camera
and other portable electronic appliances.
William Kao, vice president, O2Micro, commented “This invention accurately and efficiently predicts the
remaining capacity of rechargeable batteries.”
Founded in April 1995, O2Micro develops and markets innovative power management, and security
components for the Computer, Consumer, Industrial, and Communications markets. Products include
Intelligent Lighting, Battery Management, Power Management, and SmartCardBus® products.
O2Micro International maintains an extensive portfolio of intellectual property with 11,830 patent claims
granted, and over 14,000 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. All other trademarks are the property of their respective owners.
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.
Gary E. Abbott
Director of Investor Relations, O2Micro
Phone: 408.987.5920, x8888