So I say it's totally doable. You just have to know how to get your energy back out of the system to make it work.

It's doable in the same way as moon walking to work 5 miles daily is doable.

 

In his application being based on the Witricity concepts I think that just making a physically larger LC type tuned coil, say 2- 4 feet in diamiter, driven by a higher power H-bridge and related driver circuits would probably work well enough.

Without knowing the specific frequency his system works at I can't calculate anything further though.

Going by the QI standards it could be anywhere between 110 and 300 KHZ which is not too difficult to work with using basic power switching devices like power Mosfets or high-speed IGBT devices.

http://www.radio-electronics.com/in...ry-charging/qi-wireless-charging-standard.php

 

I see this stuff advertised and hyped as wireless but it's really just moving the wire from the device to a still near-field charging mat. None of the systems so far including Witricity allows for random position recharging of a device within in a normal room. Up to 42% transmission and usually much less efficiency is a good way to double your electrical power budget.

 

On to the next one.