Patent for Battery Cell Monitor/Balance Issued to OMicro

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November 21, 2011.O₂Micro® International Limited (NASDAQ:

OIIM

) was issued 13 claims under United Statespatent number 8,004,246 for its Battery Cell Monitor and Balance invention; a continuation of the invention issued April 2010 under United States patent number 7,696,725.

This patented IC accurately monitors cells and balances voltage levels of cells in battery packs for notebook computers, cell phones, PDAs, and other devices with multi-cell rechargeable batteries.

Bill Densham, strategic marketing director at O₂Micro, remarked “This patented circuit provides reliable voltage measurements and flexible cell balancing methodology, using O₂Micro’s Bleeding-on-demand® technology.”

About O₂Micro

Founded in April 1995, O₂Micro develops and markets innovative power management and e-commerce components for the Computer, Consumer, Industrial, and Communications markets. Products include Intelligent Lighting, Battery Management, and Power Management.

O₂Micro International maintains an extensive portfolio of intellectual property with 17,633 patent claims granted, and over 18,000 more pending. The company maintains offices worldwide. Additional company and product information can be found on thecompany 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.

Contact Information:
Gary E. Abbott
Director of Investor Relations, O₂Micro
Phone: 408.987.5920. x8888
Email:gary.abbott@o2micro.com

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