O₂MICRO RECEIVES SIGNIFICANT BATTERY PACK PROTECTION PATENT

GEORGE TOWN, Grand Cayman, July 21, 2015. O₂Micro^® International Limited (NASDAQ Global Select Market: OIIM), a global leader in the design, development and marketing of high-performance integrated circuits and solutions, was issued a patent for a significant Battery Protection invention.

This invention includes a set of protection circuits capable of protecting a set of battery modules. There were 20 claims issued under U.S. patent number 9,071,049, a continuation of the invention issued August 2013 under United States patent number 8,502,503.

Bill Densham, strategic marketing director, O₂Micro, stated "Large battery systems are comprised of interconnected modules. These energy storage systems may experience faults from module disconnects caused by vibration or temperature cycling, induced mechanical connector failure, lead fracture, aging and corrosion. The protection circuits enabled via this invention will monitor, notify and protect the battery system during a fault event."

About O₂Micro

Founded in April 1995, O₂Micro develops and markets innovative power management components for the Computer, Consumer, Industrial, Automotive and Communications markets. Products include LED General Lighting, Backlighting, Battery Management and Power Management.

O₂Micro International maintains an extensive portfolio of intellectual property with 28,852 patent claims granted, and over 29,000 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, and combinations thereof are registered trademarks of O₂Micro. All other trademarks or registered 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.

Contact Information:
Scott L. Anderson
Director of Investor Relations, O₂Micro
Phone: 408.987.5920. x8888
Email: scott.anderson@o2micro.com