Nokia Got New Patent for Self-charging Phone

  Kinetic charging of cell phones are confined in the external charging so far. However, Nokia considered seriously about Piezoelectric cell phone that will be charged based on the movement of the user. Piezoelectricity is the ability of some materials (notably crystals and certain ceramics, including bone) to generate an electric field or electric potential  in response to applied mechanical stress.

According to New Scientist:

Nokia envisages a phone in which the heavier components, such as the radio transmitter circuit and battery, are supported on a sturdy frame. This frame can move along two sets of rails, one allows it travel up and down, the other side to side.

Strips of piezoelectric crystals sit at the end of each rail and generate a current when compressed by the frame. So as the user walks, or otherwise moves the phone, the motion generates electricity. This charges a capacitor which in turn trickles charge into the battery, keeping it topped up.

It does not mean that you can get rid of your charger completely to charge your battery. But, it is definitely going to supplement the requirement for charging your cell from an outlet if the user is very active. If implemented, it is going to be a big blessing for the developing countries where the generation of electricity is limited.

But, some question will remain until we use it. If you’re sitting at your desk all day, for example, do you have to shake your phone to make a quick call if you’re have low charge? And how much energy will the thing be able to generate even while you’re walking with the cell in your pocket?