The iPhone 5 Power Skin Case allows you to never experience downtime with your iPhone. The iPhone Power Skin Case is a rechargeable lithium polymer battery in the protective case so whether you"re out of power or just want to double your battery life,just plug in your iPhone Power Pack Case and double the time with your phone.Capacity: 2000mahInput Voltage: 5V Input Current: 0.5AOutput Voltage: 5V Output Current: 1ARecharge Methods: USB CableProduct Material: PVC