New Trent Trident IMP71T 7100mAh External Battery Pack with Tri-output Port Charger with Large LED Display External Battery for IPhone, ITouch, IPod, GPhone, Blackberry and Game Sytem Generic Powerful External Battery for all devices with 5V output Good for blackberry, GPhone,all portable game system including PSP Slim, Pandora PSPs including Nintendo DS, Nintendo DS lite and Sony PSP Huge Capacity 5000m, about 400% of 3Gs iphone battery life capacity Enjoy 38 hours video playing time for 3Gs iPhone and 1st and 2nd generation itouch