Eli5: What happens when you use a powerful charger on a smaller device?

Question

I plugged my phone into my laptop charger to see what would happen. My phone on 10% said “charge time 2 mins”. But then after a bit it changed to 45mins.

Does the phone somehow change the power of the charger to a more sensible power?

My phone has a fast charger which is usually “1hr” to fully charge.

In: 5

Answer 1

Be carefull on this one. Li-ion Batteries and Li-Pol batteries have different chargers, and batteries can ignite with the wrong charger. A lot of Laptops ahve high density Li-Po batteries nowadays.