LiFePO4 (Lithium-Iron-Phosphate) batteries are generally safer than LiIon (Lithium-Ion) batteries because they have a lower energy density. This means they can store less energy per gram, reducing the risk of fire or explosion. LiFePO4 batteries are also less prone to thermal failure because they have a higher temperature threshold. They are also more durable and have lower self-discharge than LiIon batteries.