O2Micro Receives Battery Gauge Patent


GEORGE TOWN, Grand Cayman, April 16, 2007 (PRIME NEWSWIRE) -- O2Micro(r) International Limited (Nasdaq:OIIM) (SEHK: 0457), a leading supplier of innovative power management, and security components and systems, was issued 13 claims under United States patent number 7,161,520 for its high precision Analog-to-Digital Converter (ADC) gauge; a continuation of the invention issued June 2004 under United States patent number 6,744,394.

This patented invention measures the general state of charge of a LiIon or Li-Polymer battery pack. It provides highly accurate charging information to enhance end-user experience. Product applications include battery packs used in notebook computers, E-Bikes, Power tools and test equipment.

William Kao, vice president, O2Micro, commented, "Accurately measuring the state of charge may result in longer battery life for mobile units. This invention in O2Micro's integrated, single chip battery gauge controllers will result in cost-effective, highly reliable battery packs."

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 7,055 patent claims granted, and over 8,000 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.


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