I got a few of these last time. Be aware they are fairly large, and weigh more than you might expect. I have charged devices ten or more times on one charge, however, and I'm amazed at the performance of these things. 8/10 would recommend to anyone. Charges ipad, Nintendo DS, and cellphones. It also shuts off when the battery is charged on your device. Which has is good for the battery on both sides of the equation.