Boost Case Powerhouse Duo 6600mAh Extended Battery Pack for iPad, iPhone, iPod, HTC, Samsung, Blackberry, Droid (Black) Dual output 2.1A & 1A - charge and extend power to any two devices simultaneously 5X Extended Battery Life (6600mAh) for iPhone, HTC, Samsung, Any Smartphone 2X Battery life for iPad 2, iPad, Samsung Galaxy Tab, Kindle, & any other tablet 2.1A output for quick charging up to 4X faster for iPhone 4, iPod Touch, HTC Evo, Samsung Galaxy, Droid, etc. Battery level LED indication, ON/OFF