1) it seems the official process does not stop to look at battery powered status (should only start when on power imho) as apparently my device has died during any official update (I was at 4.1.2, from memory. The official update from 3.whatever went well, back in the day).
2) perfect timing - just before a trip when I might have had some additional pleasure out of it.
Times like this make me think maybe I should not have been 'independent' and gone with "the other popular" tablet OS.
Again, suggestions welcome. I have already accepted that my data is lost.