Linked below is an article about using energy in radio & TV waves to charge mobile devices. Big question mark here. Reality is likely to raise its ugly head.
It's fundamental that electricity (or any other form of energy) doesn't come from nowhere. Radio & TV transmissions require huge inputs of energy (in the megawatt range) by the broadcaster. At the receiver, this induces a tiny current in a tuned circuit, which is amplified (with input of more energy from a wall outlet or battery) to produce video &/or audio.
While this is a good system for distributing video &/or audio, it's a hopelessly inefficient system for distributing electricity. As the owner of a mobile device, you may find "free" electricity attractive. If this technology became widely available, one of two things would have to happen:
1. broadcasters would pay a disproportionately high price for "free" electricity for mobile devices; or
2. Nokia needs to discover a new law of physics.
http://www.guardian.co.uk/environment/2009/jun/10/nokia-mobile-phone / Phone smartphone smart phone electromagnetic radiation battery recharge LiIon lithium ion trickle /
