@quixoticgeek
Looks like there are differently named flavors for this. I would prefer a simpler go-slo throttle like you described.
""Adaptive Charging" is the name of the feature on Google Pixel phones. OnePlus devices have a similar feature called "Optimized Charging." Samsung Galaxy devices call it "Adaptive Battery" and also have a feature that allows you to cap the battery at 85% all the time. (The iPhone has a similar feature named "Optimized Charging," too.)"
https://www.howtogeek.com/803245/how-adaptive-charging-saves-your-android-battery/