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Why Charging Your Gadgets Over 80% Is Such a Bad Idea | iFixit News
(www.ifixit.com)
This is a most excellent place for technology news and articles.
There used to be a magisk module that would charge the battery intelligently and stop before b Full charge but I don't think it exists anymore sadly, or at least I haven't been able to find it
That is ACC, still alive and kicking. Here is a gui front end for it, you can get it from fdroid or GitHub https://github.com/MatteCarra/AccA