Jog to charge your phone with Kinetic energy concept

Lola Mensa’s Cargador De Celular is quite simple. Come back all refreshed after you morning run and you will have your phone charged for the rest of the day. The charger uses the same technology found inside self-winding wristwatches. With every footfall, you keep giving little charge to the internal battery which will in turn power your phone, MP3 player or anything you want to get charged. It has a flexible design and will not cause any major adjustments if in future you ever wanted to stick this concept in your running shoes someday.
[Gizmodo]