Charge Apple and Android smartphones and tablets, as well as other USB devices like e-readers, portable speakers, wireless headphones and more, 2600 mAh battery capacity, prevents overcharging, overheating and damage to device, turns battery on / off automatically when a device is connected or removed, automatically detects type of device connected and provides maximum charge output, up to 1 amp output, constructed with LG Grade A cells, lipstick size design, 3.5W x.9H x.9D, white.