Zitrades 4400mAh Aluminum alloy External Backup Battery Power Bank with DuaL USB Port Charger Adapter Pack for iPad2 / iPad, iPhone 4G/3Gs/3G (AT and T and Verizon), iPod Touch, Motorola Droid Phones, HTC Android Phones, Blackberry, Kindle DX, Samsung Galaxy S, Samsung EPIC, Nintendo, Sony PSP etc. Review