Because of some do-not-match numbers? In short, if your Librem 5 turns off when you take its BPP-L503 battery out this means that you are either using wrong cable to charge this battery or even that you are using wrong power supply (or both) there. If and when you use reliable charging equipment please follow this:
Now turn off your Librem 5 with: sudo systemctl poweroff, insert BPP-L503 battery back into its slot and wait until red LED light off, at phone consumption between 0.08A-0.09A (before this procedure you can still use and charge your phone to almost full). From there you might proceed as you think that suits there better (but I’ll disconnect power supply and power on Librem 5 normally). There are some other commands that I use but: upower -d should do (check/note this output before, when battery out, and after booting your phone back again:
@guru , and this below screenshot shows correctly calibrated battery (and I think that I know how to get there) under PureOS here related output:
