battery charge limit at 80%

So I’m new to DMD2 (Android altogether actually), but so far I really can’t complain about my T665.
What I do miss a little bit is a feature, that iOS has offered for quite some time now and some Samsung phones seem to offer as well: Capping the battery charge at something like 80%, so the phone doesn’t stay at full charge all the time, which is not the healthiest for lithium batteries.
I do not know how easy this would be to implement, but since most of us have our devices plugged in basically all the time, this could be a feature that would be useful for pretty much everyone.

I tried to search for this topic in the forum but wasn’t successful. If already posted, please ignore/delete.

Thanks and all the best from Austria
Benedikt