... lithium ion battery cell 2. High capacity and long cycle life 3.Have a power indicator and LED lamps ... ,red Main application fielduniversal usage as stand-by power for cell phone, smart phone, iphone series ... MP4/MP5personal digital consumer goods as follow, digital camera, tablet computer, PDA, PSP, IPAQOther electric devices ... battery pack for iphone 4,4g/2200mah power bank external battery pack