Wireless power transmission

Wireless electricity or witricity is useful where interconnecting wires are inconvenient or hazardous.

Efficiency is critical to good design and economical operation. Methods include:

• Direct induction, (most common, widely used for electric kettles and for charging electric toothbrushes)
• Resonant magnetic induction
• Electrical conduction via contact points
• Electromagnetic radiation in the form of microwaves or lasers

Disclaimer: Take appropriate precautions, particularly if there is exposure strong electromagnetic fields. The following for information only.

http://m.instructables.com/id/Wireless-Power-Transmission-Over-Short-Distances-U/

• http://electronics.howstuffworks.com/everyday-tech/wireless-power.htm
• http://web.mit.edu/newsoffice/2010/wireless-power-0409.html
• wikipedia: Wireless power