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Old 04-14-2013, 07:35 AM   #1
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Forest River Owners Club
Join Date: May 2012
Location: Great Smoky Mountains, TN
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Dry Batteries

How much water do you typically add to your batteries and how often. I'm having to add a pint to one battery every month. The other battery never seems to need much. I have them on a Battery Tender Plus maintainer, with a Trik-L-Start over to the chassis battery. The chassis battery never needs much either. They are all staying at full charge. This just seems a bit excessive for the one battery. Should I be concerned? Is this battery beginning to go?

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Old 04-14-2013, 07:47 AM   #2
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Having to add water to just that one battery is a sign that something is going on with it. Having to add water a lot will eventually replace all the electrolyte in the battery and it will fail. The best thing you could do is get the battery tested by a load test or you can check each cell out if you have a hydrometer to see if it is going bad. If it is going bad it will be wanting to drag the other battery down also with it.

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Old 04-14-2013, 07:47 AM   #3
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Yes, it is the first symptom/warning of a shorted out battery.

This happen to me with two of the four 6 VDC batteries I had in my battery bank. There were all of the same vintage too.

I do not know what would cause this to happen, but I noticed mine over a 2-3 month period. Normally, I would only put a little water in every few months or so. Whereas I was now putting a pint of more in every two weeks.

The last straw was one day I opened the battery compartment door and the smell of battery gas was over powering plus two batteries were very warm and the outside casing was bulging. That's was enough for me to disconnect them immediately BEFORE they blew up.

I removed all four and replaced with new ones. That resolved my problem.

I also use Water Miser caps which reduces the frequency of having to add distilled water to the batteries. Now, with the new set of 6 VDC batteries, I only add a small amount every 4-6 months or so.

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Old 04-14-2013, 08:13 AM   #4
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One weak battery will also shorten the life of the stronger battery. I recommend keeping the batteries balanced with both or all, the same age. I used to mix them on big equipment just to save money, but the RV is a different issue, you just don't want acid boiling out on that tray under your head while you are sleeping.
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