Ok, thanks.
I wanted to try it on a version of android 9 but it doesn't work.I made a Solis app too. It's probably not as extensive as above but it's free and gives you notifications on high and low battery, which is what I really want:
View attachment 156193
https://play.google.com/store/apps/details?id=com.quickbrownbox.solisquickview
Feedback welcome.