should you decide to have a go with these, be sure to take a good
digital voltmeter with you, and i would not accept any of them that
were under 12.2volts (which technically is a depleted battery) and
for the price i would not accept any under 12.5volts.
my younger brother just brought in 9 gell batteries 100amp/hr 12volt
which on the surface looked good at 11 bucks each, however there was only one that was over 12volts, the remainder were under 11 with most under 8volts and a couple at 3.x volts each!
i agreed to work with them, carefully recharging them one by one to see if i can get them up to full charge... all so far have topped out just fine, but it is still to be seen what their available capacity remains.
11 bucks each for 3 yo batteries is an ok deal because they are worth 15 bucks each as cores to me, however had they been 40 bucks each?
not such a good deal.
the guy that had them had them sitting in his garage for the last year or so, he thought he had gold, but without maintenance charging it is a real crap shoot.
don't get stung by someone like that.
take your meter, cull out the worst and offer him 25 bucks each for the best of the lot, maybe you will only get one or two strings that are in good state of charge and useable.
i would go ahead a buy a couple extra's to keep on hand and in rotation with the strings so that you will have a spare of the same age/capacity/type if needed.
at 25bucks each you would be risking ~10bucks each (less core value) and in my opinion that would be a reasonable gamble given the insanely high price of new batteries these days.
bob g
bob g