... ,2 USB output socket portable power Portable power 5000mAh/I-phone 4/I-pad /2 usb port Product features: 1. Built-in ... display the power and electricity state. Specifications:1. Core type: li-ion polymer core, rechargeable, 500times above charging cycle,2. Hard plastic ... , 4G, mobile phones, MP3, MP4, PSP, etc Portable power 5000mAh/I-phone 4/I-pad /2 usb port