as an aside car batteries are the biggest rip off in the auto parts industry the overwhelming majority of the time the battery is fine and just needs a top off and a charge, why do you think they encourage you to bring your old one in to recieve the "20 dollar core charge discount? so they can take the core out, put it in a shiney new plastic holder squirt fresh juice in and sell it to another asshole that doesnt know anything for 100+ bucks thats why.
lets analyze what a battery is, it is a block of lead with dilluted sulfuric acid in it and thats about it.
batteries go "bad" when they......
1> are used on a car with a shitty alternator that does not properly recharge the battery when it is in use
2> sit for a long time, expecially if left on the ground and are allowed to let their charge drain.
3> are in a dry hot climate and the water evaporates leaving it low
4> have been topped off to many times with water and not had any of the acid/electrolyte replaced to keep the ratios in check.
5> are over charged and the solution inside boils out, ruining the electrolyte, oxidizing the lead and making the water low.
6> are so old when you look inside the lead is white instead og gray
all but number 6 is fixable with minor effort
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