With Ampy, You'll Get a Charge Out of Exercising

While some people are vaguely aware that movement can be converted into electrical energy -- think wrist watches or emergency crank flashlights -- a new Kickstarter project has created Ampy, a small, wearable battery pack that can harness the kinetic motion of common humans and release it back into smartphones, smartwatches and other USB-powered electronic gadgets. If you walk about 10,000 steps, cycle for one hour, or run for 30 minutes, you can generate about three hours of smartphone life.