ActionHeat 3.7V Rechargeable Battery Kit for Socks AH-Men-Outerwear 5 hours of heating on

5 hours of heating on the high setting

Plug-In – Connect the batteries to the USB cords located in the pocket on the top of the sock

Charge Up - Fully charge the power bank with provided charger kit

Breathable synthetic fill insulation

Cold fingers are just not in the equation

ActionHeat 3.7V Rechargeable Battery Kit for Socks AH-Men-Outerwear 5 hours of heating onThe ActionHeat 3V batteries are super slim, sleek, and powerful. They are designed specifically for ActionHeat socks. They fit perfectly into the battery pocket on the top of the socks. Specifications: Lithium Polymer Core Battery Voltage: 3 Volt 1 amp output max Charging Time: 3 4+ hours Battery Care: It is important to maintain at least 25% of your battery power when not in use. Failure to do so may result in performance problems and reduced battery