Battery mot charging past 54%

[megous]

I have a 'Post Market Edition' Pine phone,  running a 'recent Mobian nightly release'.
It charges to 100%,    then it discharges to 93 - 95%...  then charges again to 100% ... repeat...
  I think the developers are still fine tuning the charging software.

Just curious,  have you tried different chargers ?
  I do see slight differences when I use different chargers.

Note :  I have several Pine phones, one has Arch installed and it charges about the same as the ones with Mobian installed.

Modem and wifi is powered directly from the battery, so once the charger stops, the battery will start draining immediately even if the phone is connected to the power adapter and powered from it. Only part of the phone can be powered from the adapter. That's how it's designed.

And the charger can't be charging all the time. So you get this slow cycling of charger after getting to 100%, even when connected to power adapter.

The only time this will not happen is when you charge while the phone is powered off.