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LET'S face it: power cables are unsightly dust-traps. PCs, TVs and music players are becoming slicker every year, but the nest of vipers in the corner of every room remains an ugly impediment to true minimalism.

Then there is the inconvenience of charging phones, MP3 players and PDAs. A minor hassle, admittedly, but it is easy to forget to top up the batteries and before you know it you have left the house with a dead gadget. Wouldn't life be simpler if power was invisibly beamed to your devices whenever you walked into a building with an electricity supply? Wireless communication is ubiquitous, after all, so why can't we permanently unshackle our electronics from power cables too?

wireless electricity wireless power transfer

No more electrical cables?

After more than 100 years of dashed hopes, several companies are coming to market with technologies that can safely transmit power through the air -- a breakthrough that portends the literal and figurative untethering of our electronic age.

Wonder what the efficiencies of these systems are!

witricity wireless electricity