Larry wrote:
Open the stubborn "maintenance free" caps by prying them out and look in
the cells to see if they're dry. Don't fill them. Add DISTILLED WATER
ONLY until it just submerges the plate tops, a little at a time. Any
cell the plates are still submerged, leave it alone until we're done. We
can't charge battery plates that aren't submerged.

Isn't any portion of a plate which has dried out, permanently damaged
and unchargeable? The rest of the "dead" battery may be rechargeable,
but the battery's capacity is reduced.