Contemporary Amperex Technology Co., Limited is a Chinese battery manufacturer and technology company founded in 2011 that specializes in the manufacturing of lithium-ion batteries for electric vehicles and energy storage systems, as well as battery management systems. CATL is the biggest EV and energy storage battery manufacturer in the world, with a global market share of around 38% and 36.5% respectively in 2025. It is headquartered in Ningde, Fujian province. Wikipedia