... 4.Compact, safe and environmentally friendly [Specification]:Battrey Type:Lithium ion batteryCapacity:2200mAh Applicable Products:mobile phone ,MP3,MP4,for iPhone,DV,Digital cameras ... 2-4 times that of mobile phone batteries.3, charge and discharge cycles is 500-800 times,and the service life is up ... 6,Equipped with a variety of USB adapters. Small size and large capacity mobile power for mobile phone