Mar 6, 2019

GEORGE TOWN, Grand Cayman, Mar 06, 2019 (GLOBE NEWSWIRE) -- O₂Micro ® International Limited (NASDAQ Global

Select Market: OIIM), a global leader in the design, development and marketing of high-performance integrated circuits and

solutions, today announced the grant of a key Battery Pack Protection patent

O₂Micro was issued 20 claims under United States patent number 9,368,981 for the invention of protection circuits for Lithium

Ion battery packs. High voltage batteries are usually composed of stacked battery modules. This invention ensures battery pack

modules are equally balanced by measuring and controlling current between modules. Unequal modules may not deliver full

energy and may result in shorter battery life.

Bill Densham, strategic marketing director, O₂Micro, commented, "This invention helps enable multi-module Lithium Ion battery

packs to maximize energy storage and battery life."

About O2Micro:

Founded in April 1995, O2Micro develops and markets innovative power management components for the Computer, Consumer,

Industrial and Automotive markets. Products include Backlighting, Battery Management and Power Management.

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:

O2Micro Daniel Meyberg

Investor Relations