Lithium Iron Phosphate (LiFePO4) batteries are one of the plethora of batteries to choose from when choosing which battery to use in a design. Their good thermal performance, resistance to thermal runaway and long cycle life are what sets LiFePO4 batteries apart from the other options. However, LiFePO4 batteries require special considerations and this document discusses these considerations and how they compare to more traditional Lithium ion (Li-ion) batteries.