I have orignal Samsung 45W charger (listed on their official site) and when I use it to charge my Galaxy S21 Ultra, it takes longer than what I have seen in some Youtube videos.
Mostly it takes the phone around 70 minutes to charge from 0 to 100.
But when i charge it using my Samsung 45W charger, i takes around 100 minutes ( 1 Hour 40 mins) to full charge.
I have tried charging the phone while the phone is turned OFF as well when it is ON, but i don't get the charging time around 70 minutes.
The fun thing is that if I plug the charger around 10-15%, it shows me that it will be charged completely in around 50mins to 1 hour, but as the time passes on, that figure increases and I get a completely charged phone in around 1 hour 40 minutes.
If anyone has a solution, please let me know.
The 45W Samsung charger says that it outputs as much current as required by the device.