Charging cell phones wirelessly seems like a far-fetched thought, but the idea gets real with Nokia’s new cellphone prototype that is able to power itself “wirelessly”. The cell phone in this case utilizes radio waves from air to convert the involved energy to recharge itself.

It works on the basis of collecting the waves wherever [dissipated from TV, radio, or other devices]and whatever [ comprises a massive range of frequencies] available into the desired form of energy that helps in recharging the battery. Therefore there’s no definite source as to how it should get wirelessly charged. Whenever the device gets an opportunity to harness the radio waves,  it just empowers itself with it.

This is just the beginning of what we had known as wireless recharging. As per Nokia the conversion capability at present is of 5 milliwatts from the air which is to increase to 20 milliwatts and then over to 50 milliwatts. In 3 to 5 years Nokia would launch such handsets.

[source: tech.yahoo.com]