I think the charging circuitry inside the keyboard case has died as the case won't even charge the PinePhone anymore, it simply does not accept any power. If I take the PinePhone out of the keyboard case and charge it up and then put it back into the case it drains the phone battery till 0% within a few hours even without use.
It seems to be faulty hardware, because the keyboard case even without phone inserted will not accept any charge to its battery.
Update:
The item that causes the problem is the USB port which has become loose and does not make the conection to the PCB anymore, when moving the plugged-in cable one can make a connection with the PCB and it charges the battery.
Shame that we can't take the thing appart and just resolder the loose USB port. :-((((
It seems to be faulty hardware, because the keyboard case even without phone inserted will not accept any charge to its battery.
Update:
The item that causes the problem is the USB port which has become loose and does not make the conection to the PCB anymore, when moving the plugged-in cable one can make a connection with the PCB and it charges the battery.
Shame that we can't take the thing appart and just resolder the loose USB port. :-((((