There are many manufacturers of LiFePO4 batteries. Some of the well-known companies that manufacture LiFePO4 lithium batteries include:

1. CATL (Contemporary Amperex Technology Co. Limited)
2. BYD (Build Your Dreams)
3. EVE Energy Co., Ltd.
4. Winston Battery Limited
5. CALB (China Aviation Lithium Battery Co., Ltd.)
6. OptimumNano Energy Co., Ltd.
7. Relion Battery
8. Enerdel, Inc.
9. A123 Systems LLC
10. Lithium Werks

There are also many other companies that produce LiFePO4 batteries, both large and small, and the list continues to grow as the demand for these types of batteries increases.