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Ford 9N, 2N & 8N Discussion Forum
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Sorta o.t. Battery charging

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Rob N VA

06-02-2005 21:07:06




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I bought a deep cycle 12 volt trolling motor battery (AC Delco) I used it three times for about an hour each time. Each time I charged it for about 3 hours with a 1 amp trickle charger. Each time after charge it read about 12.6 volts. The last time I used it I forgot and left the charger on all night and most of the next day. Volts read about 12.9. This is a maintenance free battery. Have I done any damage to my new battery? Can I trust it to still run my trolling motor for hours on end? Thanks for helping me out with this O.T. I have been trying more diligently to answer my questions on my own lately, but I figured if anyone can help on this one, you guys sure can. Thanks again!---Rob

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Art Wallin

06-03-2005 09:18:14




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 Re: Sorta o.t. Battery charging in reply to Rob N VA, 06-02-2005 21:07:06  
Rob
I am in concert with rest of respondants, you probably have not over charged the battery. If you have an interest in knowing more about batteries there is a web site called BatteryStuff.com which has a tutorial. If I am charging a battery I place my hand on the side of the case and see how warm it is. You want to avoid temperatures above 125 degrees F. A deep cycle battery has thicker plates and fewer of them. Starting an engine requires(based on engine size and compression ratio)a lot of current for a short time so a battery with many plates is desirable (more surface area for the acid to react upon). Your trolling motor needs much less current but for a long time. Think of the plates as a sponge. A thick sponge will take a longer time to fill all the cavities so a lesser amount of current can be drawn from the battery for a longer time. All batteries have what is termed an acceptance rate based on the number of positive plates per cell. The greater the number of plates the higher the acceptable charge will be. Your battery supplier can provide you with that info. When you discharge a battery the acid leaves the solution and goes into the plates and when charging you are reversing the process, and if you can access the liquid you weigh the solution with a hydrometer. If the acid is back into the liquid it weighs more because sulpheric acid is heavier than water and causes the float to rise out of the solution further. Enough is enough, this is probably more than you wanted, but may give insight on whats happening as you try to outsmart the elusive Bass.
Art in Texas

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GAJIM

06-03-2005 05:28:10




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 Re: Sorta o.t. Battery charging in reply to Rob N VA, 06-02-2005 21:07:06  
You're OK. You'd have to leave a 1 amp. trickle charger on for a very long time to do any damage. GA Jim



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rbell

06-03-2005 04:48:29




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 Re: Sorta o.t. Battery charging in reply to Rob N VA, 06-02-2005 21:07:06  
Fully charged I would expect it to read 13.8 or so



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Mike S

06-03-2005 03:57:04




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 Re: Sorta o.t. Battery charging in reply to Rob N VA, 06-02-2005 21:07:06  
It will be just fine, I doubt you hurt it at all. I used to charge mine with a 2 amp trickle charger and would usually leave it hooked for a day or two before putting in the boat and it lasted for years doing that.



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