Battery Maintenance - Revive your Dead or Dying 12v Aux Battery

Except when your "dead" 12v battery gets revived.

Couldn't get my Gen2 started as charge was apparently on the lowest voltage to do a start
for a couple weeks. Driving it didn't bring it back sufficiently above "reliable start" voltage.
So was using a Jump start pack to get it running. Bad enough so this Scottish miser
literally called several battery shops to get best prices.

Well, charged it with a "smart" charger, then driving it seemed to work when it apparently
charged it "officially."
To my surprise and relief it has worked flawlessly for the past year ! (except when I left a door open)