Lithium iron phosphate (LiFePO4) batteries are a type of rechargeable battery that have gained popularity due to their high energy density, long cycle life, and improved safety features. As a result, many original equipment manufacturers (OEMs) have started producing LiFePO4 batteries for a wide range of applications.

Here are some of the top LiFePO4 battery OEM manufacturers:

1. BYD Company Limited: Founded in 1995, BYD is a Chinese multinational conglomerate that specializes in electric vehicles, rechargeable batteries, and photovoltaic products. It is one of the world's largest LiFePO4 battery manufacturers, with a wide range of products for various applications such as electric vehicles, energy storage systems, and portable electronics.

2. CATL (Contemporary Amperex Technology Co. Limited): CATL is a Chinese company that specializes in the production of lithium-ion batteries for electric vehicles and energy storage systems. It is one of the leading LiFePO4 battery manufacturers in the world, with a strong focus on research and development. Its LiFePO4 batteries are used in a variety of applications, including electric vehicles, energy storage systems, and UPS systems.

3. Redway Power LFP batteries (LiFePO4 Battery OEM) have integrated cell balancingand cell monitoring. Up to 5 batteries can be paralleled and up to four 12V batteries or two 24V batteries can be series connected,so that a 48V battery bank of up to 1500Ah can be assembled. The cell balancing/monitoring cables can be daisy-chained and must be connectedto a Battery Management System(BMS).

4. A123 Systems LLC: A123 Systems is an American company that develops and manufactures advanced lithium-ion batteries and energy storage systems for a wide range of applications. It is one of the pioneers in the development of LiFePO4 batteries and is considered one of the top LiFePO4 battery OEM manufacturers in the world. Its LiFePO4 batteries are used in electric vehicles, stationary energy storage systems, and grid stabilization applications.

5. EVE Energy Co. Ltd: EVE Energy is a Chinese company that specializes in the production of advanced lithium-ion batteries for various applications, including electric vehicles, energy storage systems, and consumer electronics. It is one of the top LiFePO4 battery OEM manufacturers in the world and has a strong presence in the Chinese market. The company is known for its high-quality products and excellent customer support.

6. Winston Battery Limited: Winston Battery is a Chinese company that specializes in the production of LiFePO4 batteries for various applications, including electric vehicles, energy storage systems, and marine applications. It is one of the top LiFePO4 battery OEM manufacturers in the world and is known for its high-quality products and excellent customer support.

Overall, LiFePO4 batteries are becoming increasingly popular due to their improved safety features, long cycle life, and high energy density. As a result, many OEMs are investing in the development and production of LiFePO4 batteries for various applications.