system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Wireless charging. No really, Explain like I'm a young child.
gpt
Two very simple ideas govern the whole thing:

1. When an electric current passes through a wire, it creates a magnetic field around it. 

2. When a wire is passed through a magnetic field, it induces an electric current within the wire. 

The shape of the wire in each case can have an impact, and if you coild the wire up, it increases the effect you see.

The section of the wireless charger you plug into the power source has a coil of wire in it. The power supply gives an alternating current - basically it switches very very quickly (tens to hundreds of times a second): This creates a corresponding switching magnetic field.

By placing another coil of wire within this switching magnetic field, you can induce a switching current in the new coil of wire. A magetic current switching many times is pretty much equivilent to moving a wire through a static magnetic field.

This switching current that's induced can then be rectified and modified (using simple electronic components) to provide a nice stable supply to charge the battery.