Tesla currently uses lithium-ion batteries in their vehicles and energy storage products, but they are not LiFePO4 batteries. The specific type of lithium-ion battery that Tesla uses is a NCA (Nickel Cobalt Aluminum) chemistry, which uses a cathode material composed of lithium, nickel, cobalt, and aluminum.

Tesla has developed their own battery technology and has invested heavily in research and development to improve the performance, energy density, and safety of their batteries. Their batteries are known for their high energy density, long cycle life, and fast charging capabilities.

While LiFePO4 batteries are known for their safety and long cycle life, they have a lower energy density compared to other types of lithium-ion batteries. This means that they may not be suitable for certain applications, such as high-performance electric vehicles that require a lot of power and range.