A phone that charges itself. In new charging system Nokia working on allows a phone to charge itself by ambient radiowaves. The waves are all around us through TVs, radios and mobile phones themselves. The power harvested from these waves is enough to keep a phone powered in standby mode for an indefinite period.
The Oyster cards used by commuters in London apply a similar principle but harvest their power from the readers they are swiped through. Nokia’s model harvests it right from the air.
System works via a wide band antenna and two simple circuits. They pick up frequencies ranging from 500 megahertz to 10 gigahertz and convert those waves into electrical current. So far they have been able to harvest up to 5 millliwatts and wish to get at least 20, which is enough to keep a phone in standby mode.
Don’t run to store immediately as these charging system are not expected to be on the market for another 3-5 years.