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Old 02-22-2016, 06:41 PM   #1
Join Date: Apr 2015
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I think I killed My Battery

Today I Found my battery completely dead, like zero volts. I go out to the storage lot once a month in November, December, January and February and plug the camper in to my truck generator for an hour or so and check everything out. We usually camp a couple of weeks a month the rest of the year so the battery stays up. Looks like I somehow left the little light on the power tongue jack on. I have the battery on a charger in my garage now. Hopefully it comes back. It is only 2 years old.

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Old 02-22-2016, 06:59 PM   #2
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If you killed it to Zero ( actually anything below about 9V) it is unlikely the battery will recover. It may take an apparent charge, but as soon as you put any load on it, it will die.


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Old 02-22-2016, 07:06 PM   #3
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I guess I'll leave it on the charger overnight and have it load tested in the morning at autozone or advance auto parts then.
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Old 02-22-2016, 07:52 PM   #4
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Why don't you just install a battery disconnect switch?
I have one and my two batteries were still nearly fully charged, after 4 months in the storage lot.
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Old 02-22-2016, 08:21 PM   #5
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How hard is it to take the battery out for the winter? Beats the heck out of hanging out for an hour every month charging it.
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Old 02-22-2016, 08:31 PM   #6
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Originally Posted by fast murray View Post
How hard is it to take the battery out for the winter? Beats the heck out of hanging out for an hour every month charging it.

Since you regularly "short charge" the battery and allowed it to discharge way beyond the normal 50% of full charge, without a doubt some plate damage has occurred. You can expect near full voltage to return however current capacity will be reduced 30-50 % of original. If the acid was reduced to water, and froze, damage could be much worse.

Easy to remove unbolt two cable connections, remove hold down strap. Remove neg post first.
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Old 02-22-2016, 08:43 PM   #7
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I used to disconnect the battery on my old camper. This new 8329ss has a disconnect switch. Disconnects everything but the jack. Battery on my old camper lasted 6 years.
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Old 02-22-2016, 10:02 PM   #8
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Although I am fully solar powered and never worry about keeping the bats up, I have a 4-way disconnect switch for the two house batteries. No disconnecting, hauling around 70+ lb bats, getting dirty, just flip the switch to off and forget about it. Cheap fix and easy to install. It has been the first mod on every RV I've owned.
My two house batteries are not outside, but under a hood that raises up to get to the batteries and 2 x 30lb gas tanks. The switches can be reached by reaching under the hood and not having to open it. Can't get any easier than that.
If your batteries are in outside boxes, you can mount the disconnect switch directly on the side of the battery box.
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Old 02-22-2016, 11:09 PM   #9
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Every 2 weeks for 2 hours, or plug the unit in for a day or two, or take the batteries out and put them on a tender that knows how to slow down to a float charge.
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Old 02-23-2016, 08:34 AM   #10
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A 4 stage battery charger may save that battery.

The 4th stage is a desulphate mode that pulse blasts high voltage into the plates that forces sulphates built up on the plates back into solution as Sulphuric Acid.

I had a "dead-dead" pair of truck batteries from my diesel prime mover die two winters ago. I replaced both with new ones and put the 2 dead ones on the battery charger. One came back almost good as new; the other was toast and turned in for core.


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battery, led

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