Lots of people carry around a battery for charging their gadgets. But just like those gadgets, the battery eventually needs to be plugged in to charge. Unless, that is, you're carrying an Ampy Energy Capturing Device. Sporting a 1000 mAh battery, the Ampy offers enough juice to get you through the day, but instead of drawing power from the wall, it charges using the kinetic energy you create just by moving — so whether you're out for a run or just hoofing it up the stairs to your office, you're creating power that you can use to charge your gadgets.