I guess car batteries can be like anything else in that sometimes you just get a bad one.
A long LONG time ago I used to work at a Dodge dealership in the parts department, and we used to have to fill the batteries with acid and then put them on a charger before we would release them. They came with the empty battery, and a plastic bag filled with the acid charge. I guess they don't do that any longer. Just as well. I remember once when I cut the filler hose for the acid charge, a squirt of acid shot out of it. Exactly eye level, but fortunately away from me rather than towards me. I wasn't all that keen on playing with the batteries any longer after that.
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