Scientists tweak wireless power transfer, Tesla nods happily in his grave

Wireless charging may be all the rage these days, but actually beaming electricity - as sketched above by the man Tesla himself - still has some snags. North Carolina State U researchers have found a way to possibly vanquish the biggest problem: the difficulty of exactly matching resonant frequencies to amplify current. If external factors like temperature change the tuning of a transmitter even slightly then power drops will occur, but circuitry developed by the NC State scientists would allow receivers to detect these changes and automatically re-tune themselves to match.

Engadget, Scientists tweak wireless power transfer, Tesla nods happily in his grave