I have the Popular Mechanics magazine right here, it showed up in my
snail mail box three days ago.I subscribe to that magazine and Popular
Science magazine.(ever since 1949)

I will Quote the aricle, it says,,,,

Wireless Power Transfer Is Old News- more than a century ago, Nikola
Tesla built magnetic coils that transmitted power without cables.But,
Tesla's coils also tended to expel burst of superhot plasma.This past
June, MIT researches announced their own coil-based breakthrough in
wireless electricity-called WiTricity-that's mercifully plasma
free.WiTricity exploits a phenomenon known as magnetically coupled
resonance, which allows two objects resonating at the same frequency to
exchange energy efficiently.The team was able to wirelessly power a
60-watt light bulb using a pair of 20-in.-dia.copper coils.Drawing power
from an electrical outlet, the source coil created a magnetic field,
which was 7 ft.in diameter, transmitting at a frequency of 10 MHz.(Many
cellphones by comparision, operate at 2 GHz) Seven feet away, a
receiving coil was also resonating at 10 MHz, pulling enough energy from
the field to power an attatched light bulb.Because it transmits at such
a low frequency, WiTricity's magnetic field passes through intervening
objects, and doesn't appear to pose a threat to people or pets.Within
five years, the team hopes to release a commercial product with better
power efficienty, a larger field and more compact coils, capable of
running multiple devices.
Unquote.

(Screw MIT!!!!!!!)
cuhulin