¡Dios mio! We're lucky it never fell out.
This ugliness makes a strong case for buying a dry cell battery. My pawn shop angle grinder in hand (knocked down to $12 from $15 because it's missing the handle and makes so damn much noise), I commenced a-cutting.
There's no turning back now. I suppose if worse comes to worse, I can just put a board over it, right?
Partial soundtrack