Patent Dispute: USPTO Again Rules in Favor of VARTA AG

The United States Patent and Trademark Office (USPTO) has delivered a key ruling in an ongoing patent dispute between VARTA AG and a Chinese competitor, EVE Energy Co., Ltd. On 8. August 2022, the USPTO Trial and Appeal Board ruled in favor of the German technology company and rejected EVE Energy’s request to invalidate all claims in VARTA’s U.S. Patents 9,496,581.

That patent had also been attacked earlier by another competitor with the result that all claims remained in force in either original or slightly modified form.

The ‘581 patent covers aspects of VARTA’s highly successful CoinPower® microbattery technology.  The patent is presently in an infringement lawsuit in the U.S. against EVE Energy.  The results of the US Patent Office decisions greatly strengthen the patent and the likelihood VARTA will prevail in the litigation. 

The ‘581 patent is one in a portfolio of patents that protect VARTAs small, rechargeable lithium-ion cells sold under the brand name CoinPower.  These cells are primarily used in premium True Wireless Stereo headsets (TWS).  The patents cover pioneering battery enclosure, contacting and manufacturing technologies, which, in VARTA’s view, are infringed upon by EVE Energy.

 This ruling in the USA represents a further clear victory for VARTA in the effort to defend its R&D investment and intellectual property.  VARTA is a global market leader in many areas of lithium-ion technology and is committed to protect its breakthrough technology and products by securing rigorous patents. VARTA does not tolerate any infringement of intellectual property. The company strongly believes in the dominant role of innovation in driving the development of the whole sector to bring future energy solutions to customers.

Press contact

Dr. Christian Kucznierz
Head of Corporate Communications

VARTA-Platz 1
73479 Ellwangen

Phone: +49 (7961) 921 – 2727


VARTA AG produces and markets a comprehensive battery portfolio from micro batteries, household batteries, energy storage systems to customer-specific battery solutions for a variety of applications and, as a technology leader, sets industry standards in important areas. As the parent company of the group, it operates in the business segments "Lithium-Ion Solutions & Microbatteries" and "Household Batteries". The "Lithium-Ion Solutions & Microbatteries" segment focuses on microbatteries, lithium-ion coin power, lithium-ion round cells (lithium-ion large cells) and the lithium-ion battery pack business. Through intensive research and development, VARTA sets global standards in many areas of lithium-ion technology and microbatteries, making it a recognized innovation leader in the important growth markets of lithium-ion technology and in primary hearing aid batteries. The “Household Batteries” segment comprises the battery business for end customers, including household batteries, accumulators, chargers, portable power (power banks) and lights as well as energy storage devices. The VARTA AG Group currently employs almost 4,800 people. With five production and manufacturing facilities in Europe and Asia as well as sales centers in Asia, Europe and the USA, the operating subsidiaries of VARTA AG are currently active in over 75 countries around the world.