What is a123?

A123 Systems, LLC is a US-based battery technology company that develops and manufactures advanced lithium-ion batteries and energy storage systems. The company was founded in 2001 and is headquartered in Livonia, Michigan. A123's batteries are used in a variety of applications, including electric vehicles, grid and renewable energy storage, and consumer electronics. The company has partnerships with major automakers, including BMW, General Motors, and Chrysler, to develop battery technology for electric vehicles. A123 has facilities in the United States, China, South Korea, and Germany. In recent years, the company has focused on expanding its energy storage solutions for industrial and commercial customers. A123 is a subsidiary of Wanxiang Group Corporation, a Chinese company that acquired the majority stake in A123 in 2013.