for iphone 4/4s external battery 1)2200 mAh emergency battery 2)leather good design 3)hot selling, Li-ion battery 4)OEM

 for iphone 4/4s external battery

Product performance for iphone emergency battery:    Apple's dedicated interface    Energy saving and environmental protection    High-capacity lithium battery, up to 2200 mA.    Intelligent charging system, the conversion rate of more than 90%.    An external power adapter can simultaneously charge the phone    Common for  iphone4 / I phone4S     Battery Type: Li-ion battery     Batteries: 3.7V/2200mAh  for iphone emergency battery     Input: DC 5.0V/1A (max) for iphone emergency battery     Output: DC 5.0V/0.5A  for iphone emergency battery 

external battery for iphone 4/4s external battery