PP Keyboard doesn't charge Pinephone (Mobian)

[jojuma]

I read everything I found, but I don't understand if there's something wrong or not.

- I tried different chargers, but none charges the PP or the keyboard while connected to the PP Keyboard (using the Keyboards USB-C port)
- When the PP is connected to the PP keyboard, the PPs battery drains even faster instead of getting charged
- I have to charge the PP and the PP keyboard seperatly (separated of course)
- PP keyboard never seems to be fully charged
- If I connect the fully charged PP to the keyboard, the battery capacity is about 30%, when switching on the (theoreticaly fully charged) keyboard battery it's about 60% max.
- Sometimes the Pinephone indicates, that it gets charged by the keyboard, but the battery percentage decreases, even when the PP is not in use (How is that possible?)

Can someone explain that to me?

Currently I have to seperate the PP from the keyboard twice a day to charge it. That is no solution. What can I do to charge the keyboard correctly (chargers should be fine)?
Is there any way to tell if the keyboard is charging at all? Or does that indicate any hardware problem?

Does anybody else have those problems?

Thanks!

EDIT:
 

Code:

cat /sys/class/power_supply/ip5xxx-battery/uevent

shows

Code:

POWER_SUPPLY_NAME=ip5xxx-battery
POWER_SUPPLY_TYPE=Battery
POWER_SUPPLY_STATUS=Discharging
POWER_SUPPLY_CHARGE_TYPE=N/A
POWER_SUPPLY_(null)=0
POWER_SUPPLY_HEALTH=Good
POWER_SUPPLY_CAPACITY=80
POWER_SUPPLY_CALIBRATE=187
POWER_SUPPLY_VOLTAGE_MAX_DESIGN=4200000
POWER_SUPPLY_VOLTAGE_NOW=3799881
POWER_SUPPLY_VOLTAGE_OCV=3862722
POWER_SUPPLY_CURRENT_NOW=866089
POWER_SUPPLY_CONSTANT_CHARGE_CURRENT=2300000
POWER_SUPPLY_CONSTANT_CHARGE_CURRENT_MAX=3100000
POWER_SUPPLY_CONSTANT_CHARGE_VOLTAGE=4228000
POWER_SUPPLY_CONSTANT_CHARGE_VOLTAGE_MAX=4242000