I too would appreciate some feedback on how to replace the battery or fix the battery firmware issue.
My pi-top[4] only ever shows Charging 0% in pi-topOS and on the OLED screen despite using the official pi-top charger.
When I run pi-top battery
I get:
Charging State: 1
Capacity: 0
Time Remaining: 0
Wattage: 0
Rather than a completely depleated and dead battery, the above to me would suggest there is a firmware problem with the battery management.
The generic firmware update software seems to have done its job and I am running v5.4
Running pi-top devices
returns HUB pi-top [4] (v5.4)
I also tried it running manually sudo pt-firmware-updater pt4_hub
but there doesn’t seem to be any newer versions.
Any help or advice would be appreciated.
Many thanks