What does LiFePO4 mean on a lithium battery?

LiFePO4 is the chemical formula for lithium iron phosphate, which is a type of cathode material used in rechargeable lithium-ion batteries. When you see “LiFePO4” on a lithium battery, it means that the cathode of the battery is made of lithium iron phosphate.

LiFePO4 is known for its stability, safety, and long cycle life. It has a lower energy density compared to other cathode materials, such as lithium cobalt oxide (LiCoO2), but it is less prone to thermal runaway and overheating. This makes LiFePO4 batteries a popular choice for applications that require high reliability and safety, such as electric vehicles, renewable energy storage systems, and backup power supplies.