Courtesy of Instructables user Inducktion shares a very detailed tutorial on how to build a wireless power charger. He explains the impetus behind the project:

For what the project lacks for in miniaturization it more than makes up for with thoroughness. Hit up the link below to check the project out.

This transmitter works fantastic, and can run on pretty much any voltage above 12 volts, and below 24! It’s also extremely efficient (little power lost) and, it generates almost no interference. (one wireless power instructable used a square wave in the primary; Square waves have a lot of harmonics, and can cause havoc on computer systems, radios, and other sensitive electronics)

I’ve come to solve all of these problems!

Wireless iPod Charger [via Make]