Do some good the next time you go out for a walk. Its something thats going to not just help in maintaining your good health but also play a small yet important part in saving the planet. The motion powered charger just sits in your pocket and recharges its built-in battery. Once its done, you can transfer the power to any of your gadgets such as a cell phone or Nintendo DS.

Six hours of cumulative motion can add 30 to 60 minutes of talk time to a cell phone. When fully charged, M2E Power's device stores enough to recharge a phone at a speed comparable to an AC outlet.

Source