Charging speed doubts.

[AjayCA]

Dude, 1 doubt I have, Galaxy S21 ultra has 5k mAh battery and supports 25 watt fast charging. Galaxy A72 also has 5k mAh battery and also supports 25 watt fast charging.

But, Galaxy S21 ultra comples 0% to 100% in 1 hour and Galaxy A72 comples the same in 1 hour 20 minutes. Why?🤔

[AjayCA]

And my Samsung 10k mAh Power bank charges from 0% to 100% in 2.5 hours with just Samsung's 15 watts fast charger 🤣 🤣. This is the fastest of all.