I was always thinking...why can't this be done and how useful it would be to have wireless power for travellers, mobile users,.. it here..almost..according to this article from BBC
US researchers have outlined a relatively simple system that could deliver power to devices such as laptop computers or MP3 players without wires.
The concept exploits century-old physics and could work over distances of many metres.
Instead of using acoustic vibrations, the team's system exploits the resonance of electromagnetic waves. Electromagnetic radiation includes radio waves, infrared and X-rays.
This is so exciting :o)
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