I'm still on 3.0, and today I got a "minor" software update to monitor for imbalanced battery discharging (or something like that).
We're on holiday, so I parked up, with 50% remaining, set it downloading, and went off to walk the dog.
Came back an hour later, and the battery is on 0%, with multiple errors - see images.
Now waiting for the AA to arrive and see if they can persuade it that it does in fact have power...
