We´re Energy

Imagine that with just walking or jogging you can charge the batteries of your cellphone or your mp3. scientists north americans and canadians created a gadget that convert in electricity the energy generated by the movement.
This gadget looks like a kneebag, can generate with just one minute of jogging enough energy to charge a cellphone during 30 minutes. This is one of the lastes creactions in the fields of human energy.

The energy is produced by a process know like " generative braking", similar to the braking sistems used by hibrids cars, in this ones the energy dissipates as the heat its used to make working a generator.