Ampy Move

This is an excellent device to charge your USB devices, including your smartphone while on the run. The ampy move is a device that is similar to a battery pack. The difference is that it charges when you are on the move.

For example, go on a run or walk to work and the battery pack charges. The ampy move has a built in 1800mAh battery that can give your smartphone some juice before the end of the day.

Of course, there are problems with this device. For one, it takes quite a lot of movement before you charge the ampy to its fullest. Apparently, its close to 50 plus hours of movement. This of course is not feasible, unless you are climbing a mountain and you're worried that your phone would run out of juice when you reach the summit.

The ampy retails for approximately 74 USD. Not too bad, but it is not recommended if you are a heavy user.