... 18650 Rechargeable LiFePO4 Battery, LiFePO4 Battery Pack for Power Tool, RC Toy, Electric Vehicle 3.2V 18650 Cylindrical LiFePO4 Rechargeable Battery ... Acid and 3 times of NIMH, 2 times most Lithium batteries.7. Wide working temperature range, From -4 F to ... energy system. 3. Military equipment: IR telescope4. Medical devices5. RC car, boat, aircraft toy6. Solar, wind power energy storage devices ...