Used the recovery menu to run the restore factory settings script,
but it didn't fix the boot loop. It also reverted back to recovery
menu v0.1, so I can't check if the btrfs fix option had helped
and also the shell option is not visible.

I believe the boot loop was initially caused by pulling off the
battery too early during shutdown. So I would assume
it is still some kind of file system data corruption issue.

Can I somehow still get a shell or have other tricks available
to try to recover it.