A123Systems
Renewable Energy Equipment ManufacturingMichigan, United States501-1000 Employees
A123 Systems is a Michigan-based developer and manufacturer of advanced lithium iron phosphate batteries and energy storage systems designed to deliver high power, maximize usable energy, and provide long life with strong safety performance. It offers comprehensive energy storage solutions from design to delivery, supporting rapid development and commercialization of new products. Its field-proven systems are deployed in vehicles from passenger cars to commercial transit buses. The company operates with vertically integrated manufacturing capabilities and holds TS-16949 and ISO 9001 certifications to ensure quality and reliability. In early 2026, it expanded its U.S. research and development footprint with the acquisition of a technology and laboratory facility in Burlington, Massachusetts, and extended its presence to Burlington, Canada.