portable power 1,Built-in high-capacity li-ion polymer battery,5000mah 2,500 times above charging cycle 3,2 USB output socket portable power Portable power 5000mAh/I-phone 4/I-pad /2 usb port Product features: 1. Built-in high-capacity li-ion polymer battery, 5000mah, to make sure 500 times above charging cycle..2. Two USB output socket, can also charge iPhone , iPad, mobile phones(like Nokia, ...