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Jan 23rd, 2013
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Fully charged? #10633027 02/20/15 04:50 PM
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donothin Online Content OP
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I have two starting batteries a little over 2 years old. They also run my electronics. Sometimes after being out a while, I will get a low voltage message on my electronics. I usually charge the batteries after being out and they show 13.2v but after a day they show 12.3v and that is before they have ever been hooked up.

Re: Fully charged? [Re: donothin] #10634225 02/21/15 01:39 AM
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You didnt say what brand but im going to guess Everstarts . If Im wrong my bad but a friend of mine had everstarts and they would charge fine read 12.9 Volts wait 2 days they would be down to 12.4 and in less then a week 12.3 I talked him into getting Dekas and he has been fine since .

Re: Fully charged? [Re: donothin] #10635244 02/21/15 04:19 PM
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donothin Online Content OP
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They are Exides. Wondering if it might be an age issue? Seems like I saw a post on here several months ago about batteries that gave a lot of information about their characteristics.

Re: Fully charged? [Re: donothin] #10636622 02/22/15 08:29 AM
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Do you have your electronics wired directly to the batteries? I have the same issue -low voltage warning -HOWEVER, thinking I could cure the problem, I put a brand new Optima group 29 AGM battery in - - NO DICE. Apparently by running the power wire through a switch, it adds enough resistance to the circuit -it throws the low voltage alarm, even when the battery, at the time it is showing low voltage, has 12.4 Volts. NOT a battery problem.

Re: Fully charged? [Re: donothin] #10646507 02/25/15 02:23 PM
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donothin Online Content OP
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Yes, my electronics are wired through a breaker switch. My guess is that you are correct. I guess i will leave it as it is, and live with having to turn my electronics on again after starting the engine.

Re: Fully charged? [Re: donothin] #10655017 02/28/15 06:29 AM
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I have the same problem I have two optima D31M batteries wired through a elector switch if i am out on the the lake with the radio on and the fish Fineder it will show low voltage after about 2hr i just went it to the setting on my Hummingbird 998 and changed the waring voltage on my unite down to 8.5v i have not had any warnings pop up since and i still have plenty of juice to start the boat even if it didn't I would just turn the switch to the other battery

Re: Fully charged? [Re: donothin] #10655081 02/28/15 09:31 AM
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Switch shouldn't add any resistance unless it corroded inside. Is it a high amp rated switch? is it an old switch? most of the switches can be taken apart and cleaned of corrosion or just buy replacement. What gauge wire are you using? are the connections clean? are your battery terminals clean and tight? Have you used a volt meter to check for a draw on your battery?

These are all things that should be answered before going out and buying new batteries. If you can still start your motor but read low voltage on your electronics your battery is not the problem.


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