Discussion
Lol, all things aside, wireless charging has been a thing for a long time, it’s just super lossy and inefficient, or at least always has been. Even now you have to be super specific of where/how you place the device. But wirelessly powered devices have been a thing for almost a century if I’m not mistaken. Just with insanely low power loads. There was soy devices at least in the 50s & 60s era that were totally passive until you shot focused radio waves at it, it would have enough power to run through a prebuilt circuit and could be used to broadcast audio from the room. In a way this is what NFC is, it takes just enough energy from the radio waves to run a tiny circuit and produce a computation.
The simplest explanation is that electromagnetic waves are just a form of energy.
From what I remember from school is that a magnetic field going thru a coil will produce a current in said coil. Basically the magnetic field makes electrons move in the coil which can be used to charge a phone battery or your toothbrush.