I was pleasantly surprised at how small this external backup battery is. Also the cord to charge the IMP500 has a double use then to charge my iPod Touch. As this battery has a standard USB port it can charge anything that uses a USB charge. I tried it on my Motorola RAZR and it worked fine. This is going to be very useful on our next overseas flight, and it will work on 240V 50HZ in France. It is a good design, well built, and I expect it to last a very long time.