external battery for iphone4s 5v,1500ma brand new, high quality durable,convenience paypal accept external battery for iphone4s5v,1500mabrand new, high qualitydurable,conveniencebackup batter for your iphone 3g/3gswhite and black standby time:up to 390 hourstalk time:up to 6.5 hoursinternet use:up to 8 hoursaudio play: up to 31 hoursvideo play: up to 9 hours external battery for iphone4s