CLEARMAX CM-500 5000mAh External Battery Pack and Charger for iPhone 4S 4 3Gs 3G, iPod Touch (1G to 5G), Android (Samsung Galaxy Note S S2, HTC Sensation EVO Thunderbolt, LG Optimus V), Blackberry (Bold curve Torch), Droid(Motorola Razr), Kindle Fire, Plus Major Tablet PCs with 5V input (Samsung, Blackberry, HTC) etc. Enjoy 65 Hours Backup Power, or 40 Hours extra for Talking,or 25 Hours For Video Works with 3G iPad/iphone4/3G 3Gs iPhone/2G 3G iTouch and all generations iPod classic Work with iPhone 4, iTouch, Kindle, Motorola Droid, HTC Android, Nintendo DS, Sony PSP This is the solution for the ideal gizmo addict, Do not be caught without any power to your favorite electronic device. Huge Capacity 5000mAh, about 300% of iPhone 4 battery life and 50% of 3G ipad battery life