... ,4s 1900mah Li-polymer cell phone external battery case for iphone 4 4S Features:1.Capactiy 1900mAh Li-polymer built-in battery ... .3.Fully charged within 3-4 hours, one and a half standby time for your iPhone 4/4s;4.Pure Hand Made, Luxury Rubber ... , special silver frame5.White,black colors are for your choice6.Cut outs for all the iPhone 4/4s features, use your iPhones without ...