The kinetic energy system uses the Faraday Principle, which states that the movement of a conductor through a magnetic field produces voltage in the conductor proportional to the speed of movement. In this case, the conductor is a wire coil. The system uses a magnet that moves against the coil every time the charger moves, generating a charge that is captured in a capacitor. A logic circuit takes the charge to the built-in Li-Ion cell, where it is stored until use.
They say 6 hours of motion will provide 30-60 minutes of power. I can't see jogging that long, but I bet we'll see things like this in the future hooked to construction equipment, dog collars, soccer-playing kids . . .
Source: blog.makezine.comAdded: 28 August 2008