I didn't see the PowerPie mentioned, I got one yesterday and im loving it so far.
I have the Note 10 plus 5G but it obviously works for the S20 series as well, I did post the below in the Note 10 forums but in case you don't check there, have a look at this beast and see my own little test/review
https://elecjet.com/collections/pow...-fast-charging-powerpie-x-20000mah-power-bank
Got to try this thing out for the first time this morning.
I let the Note 10 plus drain until it turned itself off in a final death cramp of a vibration ;-)
Using the short usb-c to usb-c cable that came with the PowerPie I plugged it in.
I had already charged the PowerPie fully using the official Samsung 45 Watt charger.
Here is what I got at first attempt on my 5 months old Note 10 plus 5G from 0%
7 min - 14%
9 min - 22%
12 min - 30 %
20 min - 47%
30 min - 66% (I've seen claims of 69% but I find 66% perfectly acceptable)
40 min 83%
47 min 90%
1 hour - 96%
1.05 - 100%
Considering that this is a powerbank, not a wall charger I find it a VERY GOOD result.
The PowerPie is still showing 3 of the 4 LED's so it is so far so good with hoping to get 4 full charges plus a bit but I'll report back on that later.