... mm× 54 mm× 13mmWeight: (about)55g Product DescriptionThis product is a high-performance USB interface, mobile power, using high-quality ultra-thin Li ... USB interface s,uch as mobile phone, iPhone, PSP, IPOD, MP3,MP4, PMP, GPS, Bluetooth, digital cameras.emergency battery external battery pack lifepo4 battery pack 5v li ion battery pack for mobile phone battery pack