... universal power bank 4.rechargeable power bank 4200mAh portable external power bank for cell phone mobile phonefeatures: Battery types: polymer ... : 178gUniversal power bank deacription:Dual USB outport interface for Ipad / Iphone charging, simultaneously to the two mobile phones or digital ... to prevent non-state power loss.This device is suitable for iPad / iPhone, mobile phones, the PSP, hTc, MP3, MP4, ...