Plasma Mobile CE Pinephone - battery not fully charging

[PineSupporter]

It's intended. The kernel limits the charging to prevent overheating.

That seems odd, no other computer has to do that.  Every other electronics battery charges to 100%.  
I got a reply from Pine64 support and they asked me to try Mobian, so I did and it charged to 99%.  But three other distros I tried all charged to mid 80s only: 
Plasma Mobile, PostmarketOS, and Manjaro Lomiri.

I had notice the same thing my pinephone, but then I remembered My note 8 does the same thing. If you are on a stock rom without root on most us variants it will show 100% but once you root you see that it's really at 80%. Before I rooted it, it showed 100% but when I rooted it i lost the ability to go the additional 20%. After some digging I'm positive it's to prevent overheating which can cause fires..

Interesting, and good to know those safety measure are in place.  Always good to learn something new