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 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 kit