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