system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does it take time for my phone to charge? Why can't the charger instantly fill my battery?
gpt
Imagine your battery is an empty water tower that needs to be filled with water (charge).

If you want to fill the water tower quickly, you need to increase the amount of water to the water tower. However, the pipes leading to the water tower are of a limited size so you have to send higher pressure water (more current). As you increase the pressure, there is a point where the pipes can't take anymore and will break (in the case of wires, they will overheat and melt).

Assuming that the pipes can hold, the water tower itself has to be able to accept that much water pressure. If the pressure is too high, the jet of water will erupt upwards and blow off the top of the water tower (batteries will explode)! Thus, the water pressure has to be low enough to not damage the water tower when filling it up.