Nokia of Finland, have come up with a new technology where the handset recharges itself by harvesting energy from the owner's motion. They have filed a US patent last week for this handset.

Nokia envisages a handset in which components, such as the battery & radio transmitter circuit, are supported by an sturdy frame. This frame can move along two sets of rails, one allows it travel side to side & other up and down. At the end of each rail strips of piezoelectric crystals have been put up to generate a current whenever the frames are compressed.

So whenever the user walks, or moves the handset, the movement or the motion generates electricity, hence this current charges up a capacitor which is finally stored into the cell phone battery.