Wireless Charging Pads Aren’t Really Wireless
 

There are a bunch of different types of “wireless” power, and they aren’t all the same. And most of them don’t really exist yet — they are still being worked on by companies that hope to be able to produce a groundbreaking new product. But many questions remain about whether they can actually achieve what they claim, since wireless charging can’t transmit power as efficiently as a wire.

http://www.howtogeek.com/geeknote/wi...ally-wireless/