Fulfilled by our friends at DSG OUTERWEARThe batteries are super slim, sleek and powerful. They are designed specifically for the DSG Heated 5V gloves and 5V socks. The 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 max Micro-USB input: 5-Volt/1 amp input Lithium-Polymer Core Battery Voltage: 5-Volt Dimensions: 7.2 cm 4.25 cm 1.35 cm Capacity: 3000maH/11.1WH 4 LED indicators display battery life and charging status Charging Time: 3-4 hours Compatible with: ActionHeat 5V Heated Premium Gloves ActionHeat 5V Heated Snow Gloves ActionHeat 5V Heated Glove Liners ActionHeat 5V Socks ActionHeat 5V Balaclava ActionHeat 5V Heated Hat Set Includes: (2) Rechargeable 5V 3000mAh Batteries (1) 24" dual battery charger cable