Thermacell

-Includes 2 rechargeable lithium-ion polymer batteries, 1 USB cable, 1 wall charger, & 1 smart charging case-Batteries fit ThermaCELL Heated Insoles ProFLEX-Each charge lasts up to 5 hours-Batteries charge in 4 hours or less-Use wall charger (included with ThermaCELL Hated Insoles ProFLEX) or any USB port to charge-Wall charger wires disconnect so charger can be a carrying case for batteries