The ActionHeat 3000maH batteries are super slim, sleek and powerful. They are designed specifically for all the 1 amp output ActionHeat products including 5V gloves, 5V socks, and 5V headwear.The ActionHeat batteries can be doubled as a device charger because of its unique 5V USB output. Just plug your USB cable into the battery and charge your phone, tablet, or camera.Specifications:USB output: 5-Volt/1 amp maxMicro-USB input: 5-Volt/1 amp inputLithium-Polymer CoreBattery Voltage: 5-VoltDimensions: 7.2 cm 4.25 cm 1.35 cmCapacity: 3000maH/11.1WH4 LED indicators display battery life and charging statusCharging Time: 3-4 hoursCompatible with:ActionHeat 5V Heated Premium GlovesActionHeat 5V Heated Snow GlovesActionHeat 5V Heated Glove LinersActionHeat 5V SocksActionHeat 5V BalaclavaActionHeat 5V Heated HatSet Includes:(2) Rechargeable 5V 3000mAh Batteries(1) 24" dual battery charger cable ActionHeat 5V 3000mAh Power Bank Kit