When people actually do the math they get promising results. WiTricity claims over 95% efficiency "when the devices are relatively close to one another". I th

When people actually do the math they get promising results. WiTricity claims over 95% efficiency "when the devices are relatively close to one another". I think to charge a car from a parking space over 90% efficiency is possible. http://www.ted.com/talks/eric_giler_demos_wireless_electricity http://www.ted.com/talks/eric_giler_demos_wireless_electrici... http://en.wikipedia.org/wiki/Resonant_inductive_coupling http://en.wikipedia.org/wiki/Resonant_inductive_coupling