Plaintiff
1 case as plaintiff.
Zhuhai CosMX Battery Co., Ltd. ("COSMX") is a Zhuhai, Guangdong–based manufacturer of polymer lithium-ion batteries. Founded in 2007 (with lithium-ion R&D dating to 1998) as Zhuhai Coslight Battery Co., Ltd., it renamed in March 2019 and is listed on the Shanghai Stock Exchange's STAR Market under ticker 688772. It is a public, independent company, not a subsidiary. Third-party data puts headcount near 23,000–23,500; trailing revenue is roughly CNY 15.5 billion (FY2025 CNY 14.4 billion), with market capitalization around CNY 17–20 billion. (Sources: cosmx.com; FT/Markit; stockanalysis.com; PitchBook.)
Products / operations. COSMX is a genuine operating manufacturer, not a shell licensor. It sells consumer lithium-ion cells and packs for laptops, tablets, smartphones, wearables, consumer drones, cleaning appliances and power tools; power batteries (cells, modules, packs, systems) for automotive low-voltage systems, industrial drones and electric two-wheelers; and energy-storage cells, modules, racks and systems for residential, telecom back-up and commercial/industrial use. It operates production bases in Zhuhai, Chongqing, Zhejiang, Malaysia, Mexico and India.
Litigation posture. An operating company embroiled in two-way, competitor-versus-competitor litigation — not an NPE. Our database shows one tracked case, as plaintiff and zero as defendant: a declaratory-judgment action, not an NPE-style infringement assertion. Its adversary, Ningde Amperex Technology Limited (ATL), a TDK subsidiary, has filed roughly 21 infringement suits against COSMX across China, the U.S. and Germany since 2022.
Notable cases. The tracked matter is Zhuhai CosMX Battery Company Limited v. Ningde Amperex Technology Limited (N.D. Cal., 5:22-cv-04510, filed Aug. 4, 2022, Judge Beth Labson Freeman), seeking declarations of non-infringement. Parallel proceedings include Ningde Amperex Technology Ltd. v. Zhuhai CosMX Battery Co. Ltd. (E.D. Tex. 2:24-cv-728-JRG, Marshall Division), multiple COSMX-filed IPRs at the PTAB, German nullity actions over EP 3 627 606 B1, and Chinese suits; COSMX also acquired several Panasonic lithium-battery patents in 2025. The technology focus is battery electrolytes and electrode/separator structures.
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CosMX filed a related declaratory-judgment action against ATL in the Northern District of California. The narrative could not verify its ultimate disposition.