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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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[–]Zapped 1 insightful - 2 fun1 insightful - 1 fun2 insightful - 1 fun2 insightful - 2 fun - 3 months ago (5 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 (3 children)
yes, i have a 12 volt spotlight that i run on it..
[–]iamonlyoneman 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 0 fun2 insightful - 1 fun - 3 months ago (0 children)
That is not a proper test. Refer to page 19 for how to load test large batteries https://dekabatteries.com/assets/base/0656.pdf
Also read the rest of it because if you have big batteries you should really know most of that stuff!
[–]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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[–]Zapped 1 insightful - 2 fun1 insightful - 1 fun2 insightful - 1 fun2 insightful - 2 fun - (5 children)
[–]aqop 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 0 fun2 insightful - 1 fun - (3 children)
[–]iamonlyoneman 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 0 fun2 insightful - 1 fun - (0 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)