Just an update guys! Since I cleaned both positive and negative battery terminals and ground I've yet to incounter the dead battery issue I posted and asked for advice. Will check and see how it's holding the charge.
glad that fixed it. BTW a neighbor was having trouble thinking he had a bad battery, He charged it overnight, car wouldn't turn over. I went over, Battery voltage was 13.2, My charger would only put in about 2A, I grabbed the battery terminals, I could rotate both with some effort on the lead post. I rotated them to scuff up the terminals, Then it started right up. So.... he cleaned the terminals and tightened them, problem gone.