tl;dr
It went down 7% from 80% in 8h 39m at zero screen use but all connectivity options on/idle.

The screenshots on android 9 (or only pro1?) are done with pressing volume down and power key same time.
I use accu battery to limit the max charge to 80% but it does not cut off the charging process. Only gives an audio signal for the user to plug out the charger.
It would be quite cool to have such a program on sfos if that really reduces battery wear by the amount the android app claims.

The false reported design capacity in 2nd screenshot is a known issue on pro1 and a user in FX forum gave a direct hint already how to fix it. Might be quickly solved. (sorry for not digging out the link)

Edit,
Just now saw the first screenshot yields quick charge information in the second row. The Pro1 battery charged from 35% to 80% in 25m using the original charger. I mainly charge in car with a regular 2A charger tho.