What is the biggest battery company?

As of 2023, CATL (Contemporary Amperex Technology Co., Limited) is considered the largest battery company in the world, primarily focusing on lithium-ion batteries for electric vehicles and energy storage systems. The Chinese company has gained significant market share due to its technological innovations and partnerships with major automakers. Other notable players in the battery industry include LG Energy Solution and Panasonic, but CATL leads in production capacity and sales.