... Around 4hours Charge time Portable External Battery charger for iPhone 4/iPod/Mobile* Battery Type:Lithium-ion battery* Capacity:2000mAh* Rated Input: 5V,800mA ... *Work for iPhone 4, iPhone 3GS,iPod nano 5th generation, all iPhone 3G,iPhone,all iPod models, Mobile phones,MP3 & MP4 Players ...