... universal dural USB 5v li-ion battery pack for iPhone 4 and iPad 2.Model:EM-6600 3.Capacity:6600mAh ... portable universal dural USB 5v li-ion battery pack for iPhone 4 and iPad SpecificationsWeight: 250gCapacity: 6600mAhCell type: Lithium-ion ... devices with a USB interface s,uch as mobile phone, iPhone, PSP, IPOD, MP3,MP4, PMP, GPS, Bluetooth, ... dural USB 5v li-ion battery pack for iPhone 4 and iPad