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a friend of mine at the marina just gifted me three huge agm batteries.
submitted 3 months ago * by ababydog from self.whatever
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[–]aqop 1 insightful - 2 fun1 insightful - 1 fun2 insightful - 1 fun2 insightful - 2 fun - 3 months ago (4 children)
damm. i put one of them on a slow charge and then removed the charger and twenty minutes later it is holding a voltage of 12.99 volts.
i am gonna offer to give these back to the guy, cuz he thought they were not good, boy was he wrong.
[–]Zapped 1 insightful - 2 fun1 insightful - 1 fun2 insightful - 1 fun2 insightful - 2 fun - 3 months ago (3 children)
Have you tested the batteries under load?
[–]aqop 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 0 fun2 insightful - 1 fun - 3 months ago (2 children)
yes, i have a 12 volt spotlight that i run on it..
[–]Zapped 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 0 fun2 insightful - 1 fun - 3 months ago (1 child)
I'm not sure if the spotlight would be enough for a proper test. You can charge them and take them to an auto parts store and they will load test it for free, or you can but a load tester and do it yourself. They run form $50-$100 but you can find them at Harbor Freight for around $20.
[–]aqop 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 0 fun2 insightful - 1 fun - 3 months ago (0 children)
i just put a digital voltmeter on it and i know how a "bad" battery behaves... and i know how a fresh battery behaves.. if the battery is bad and i put a heavy load on it and it drops low maybe below 12 volts, it aint good.
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[–]aqop 1 insightful - 2 fun1 insightful - 1 fun2 insightful - 1 fun2 insightful - 2 fun - (4 children)
[–]Zapped 1 insightful - 2 fun1 insightful - 1 fun2 insightful - 1 fun2 insightful - 2 fun - (3 children)
[–]aqop 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 0 fun2 insightful - 1 fun - (2 children)
[–]Zapped 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 0 fun2 insightful - 1 fun - (1 child)
[–]aqop 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 0 fun2 insightful - 1 fun - (0 children)