Anker® Astro3 10000mAh Dual 2A USB Output External Battery Pack and Charger for iPhone 4 4S 3GS, iPod, iPad ; Most Android Phones: Samsung Galaxy S S2 S3 / HTC One X One S Sensation EVO / Motorola Droid / LG Optimus / Nokia N9 Lumia; Cameras: GoPro -