Some electric guitars use "active electronics" or have on board effects. Most of the time these things are powered by a 9 volt battery. Of course the battery can die and then you don't get to play . I think a wireless charging system would be really cool. The "dock" could be built out of one of these Musician's Gear Tubular Guitar Stand | GuitarCenter. You place the guitar in the stand and the wireless charging system tops off the battery inside. I've seen lots of 3.3 and 5 volt charging systems but never a 9 volt one.
Could this be done?