Why the 45W fast charger not supported?

[Mike Dee]

My 15W charger and S10 charge pretty fast as far as I'm concerned. Can't wait to see how fast my S21 will charge with the 25W adapter I bought from Samsung.

A little faster but it depends on how far down the battery is drained. The wattage goes down as the battery fills up.

 

[Mooncatt]

My 15W charger and S10 charge pretty fast as far as I'm concerned. Can't wait to see how fast my S21 will charge with the 25W adapter I bought from Samsung.

If you go by the time to charge, you may not see any appreciable difference. Even though the charger is more powerful, it's also a bigger battery.

 

[GrumpyMomofMacR]

I’ve been charging my S20 on an Apple MagSafe charger overnight. So far, so good. No problems even in a LED Wallet Case. I was planning to do the same with my S21 Ultra on occasion, unless someone here says that’s bad for the phone. The MagSafe is Qi standard. 15 watts if paired with the 20 watt Apple brick. I’m using an 18 watt brick from my iPhone 11 Pro. I think that drops the capacity down to 7 watts but I’m not sure. Everything charges by morning.