Recovery does not give me the chance to reach the factory reset option: after watching the progress bar stretch across the screen a while, the Android Robot keels over underneath the red exclamatory triangle.
Not that I can tell. I mean, it responds without delay and in the usual ways when I press it, depress and hold in combination with volume keys, etc. How might I confirm a sticky power button, sd_shadow?
Does the recovery mode failure change your thinking about the nature of the failure (i.e., hardware vs. software)?
In any event, if some day I do get around to a second battery refresh, I will gratefully post the results.
Thank you for your guidance, sd_shadow!