High capacity: with high capacity 5000mAh li-polymer battery. Long life: rechargeable li-polymer battery, up to more than 500 circles, later the power can still remain 80%. Two USB out: can charge iPad or iPod, mobile phone or MP3/MP4 at the same time. High security: protection for overcharge, overdischarge, overload, and short circuit protection. Come with several phone connectors for easy and convenient use when charge mobile phones. Internal battery type: li-polymer battery cell. Capacity: 5000mAh/18.5Wh. DC in: mini USB 5V 1A(max.). Two USB out: 5V 1A.