portable power 1,Built-in high-capacity li-ion polymer battery,5000mah 2,500 times above charging cycle 3,2 USB ... usb port Product features: 1. Built-in high-capacity li-ion polymer battery, 5000mah, to make sure 500 times above charging cycle..2 ... :1. Core type: li-ion polymer core, rechargeable, 500times above charging cycle,2. Hard plastic shell, white color,3. The battery capacity:5000mah / 18 ...