system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:How does wireless charging work?
gpt
It uses the same principle as a Transformer. There is a coil in the charger and one in your mobile (or any other device). And those two coils are coupled by an  electromagnetic field.
The charger coil creates the field and the field is used to transfer energy to the second coil. It usually only works at close range because the field strength goes down fast with distance.