... 18650 Rechargeable LiFePO4 Battery, LiFePO4 Battery Pack for Power Tool, RC Toy, Electric Vehicle 3.2V 18650 Cylindrical LiFePO4 Rechargeable Battery 1500mAh ... . Power tools, UPS and solar energy system. 3. Military equipment: IR telescope4. Medical devices5. RC car, boat, aircraft toy6. Solar, wind power ...