Wireless charging is not really wireless, in terms of today’s technology. The traditional set up involves plugging in a charging pad to a wall and then carefully placing a smartphone or tablet on top of that pad. So you’ve not really eliminated any cords. The Ossia Cota system could change that.
The startup’s Cota (charging over the air) technology sends power to your mobile devices the same way a router sends data, by flowing through the 2.45-GHz spectrum band. The system involves a transmitter with AA batteries and a receiver.
The receiver would be built into your devices, and would broadcast a low-power beacon signal to the transmitter at a rate of 100 times a second, which will tell the transmitter how dire the charging situation is. When the transmitter gets that signal it sends power back.