XTG Technology's All in One Dual USB Car and AC Wall Travel Charger - Numerous Options to Easily Charge Up 2 USB Devices - Ideal for iPod, iPhone, HTC Evo, SmartPhones, Nook, E-readers and Many More Chargers Your USB Power Device by AC (home), DC (car) Use with AA or 9V batteries for Emergency on the go Power Boost to your Mobil Device. Dual USB Charging Ports: Provides 1000mAh of current when charging one device, and 500mAh of current to each port when charging two devices from the AC or DC power input. For Emergency or on the go Power Boost to your Mobile Device The AA and 9V Charges using a single USB Port at 500mAh. 2 Year Warranty