... with usb battery charger 1,Portable,mini size. 2,Rechargeable polymer battery. 3,Led lighting. potable mobile power bank with usb battery charger ... Charging output voltage, electric current: DC5.0V 500mAh Battery Capacity:3.7V 2200mAh Taiwan patent: M 424721 ... phone with 2200mah capacity) Function4, handsfree receiving the call or redial out . potable mobile power bank with usb battery charger