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Old 02-25-2014, 01:17 PM   #1
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Is DW right? Was it bad to leave the battery in the trailer over winter?

Ok, I'm hoping somebody can set my nerves straight. Last fall, when I parked the trailer back in storage I just hit the disconnect like I always do and never bothered pulling the battery.

I knew it'll still drain to air some, but figured come this spring I could get my truck close enough to plug in and provide enough power to raise the tongue jack, then backup the couple more inches it takes to lower the jack. Once I got the unit home, I could leave it plugged in for maybe up to 3-4 days before a neighbour calls the township on me, which should hopefully charge me up enough before I have to run it back to the storage yard.

DW's under the impression we'll need to buy a new battery because I didn't pull the battery and bring in the house and hook it up to a charger, yada yada yada....

I can't check on it now, since the trailers under a 6' snow drift. So, can anybody tell me, should I be watching for battery sales?

PS, the battery should be fairly new, we just got the trailer last April and dealer claimed they provided a new battery, not the one that was in the rig at the trailer show. Never did check though....

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Old 02-25-2014, 01:24 PM   #2
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If the battery was fully charged and un hooked it will most likely be ok.
Trickle charge it when you get it home.


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Old 02-25-2014, 01:26 PM   #3
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So I shouldn't just plug the trailer in and let the converter do it's thing? If I need to put it on a trickle charger, I might was well go there, dig it out and bring it home this weekend.
There's no use crying over spilled milk, unless it's on your keyboard.
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Old 02-25-2014, 01:26 PM   #4
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Batteries should be fine if they had a full charge when you stored them. I checked mine this weekend after they had sat since early Nov. Still had 12.5 volts. I put the trickle charger on them, but they wouldn't have been completely dead in the spring if I hadn't.

If your storage location gets some sun, it might be worth investing in a small solar charge "maintainer" to keep them fully charged. Then you don't have to worry about it. And you don't have to worry about DW worrying about it either

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Old 02-25-2014, 01:27 PM   #5
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for us in California, it's not an issue especially if you used the battery disconnect switch.
i have one on my two batteries and i stored the trailer for 4 months and the batteries barely lost any charge over that time.

but we never get super low temps. but there's no reason to expect to have to replace the battery, as long as it was fully charged when you parked it.
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Old 02-25-2014, 01:42 PM   #6
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If the batteries froze the side will be bulged out. A battery with a charge can't freeze but will freeze very fast when the charge gets low. Im sure thats not the most scientific method of determining if the battery has frozen but it works. Just feel the sides bulge find a battery sale.
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Old 02-25-2014, 01:48 PM   #7
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There are a few variables that can impact the battery in your situation.

Was the battery at 100% when you pulled the disconnect?

Are there Parasite Draws that are not removed when you pull the disconnect in YOUR installation? (Propane Detector comes to mind)

Batteries do not "discharge to air" but they seem to. There is internal resistance in each battery cell the will cause a self discharge over time. Depending on your battery's manufacturer this can be a significant factor in battery life when totally disconnected.

Even under perfect conditions, some batteries can "self discharge" dead in as little as 45 days, so checking in monthly is recommended.

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Old 02-25-2014, 02:28 PM   #8
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Whether DW is right or wrong is irrelevant. It's what you tell her that matters.

"I read it on the Internet so it must be true" works really well
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Old 02-25-2014, 02:34 PM   #9
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I prefer:

"Ok, Hun. I've done a bunch of research and the battery should be fine, but I'll double check it when the glaciers recede and we can get to the trailer."

Thanks everyone for their replies.
There's no use crying over spilled milk, unless it's on your keyboard.
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Old 02-25-2014, 02:38 PM   #10
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I don't know about your wife, but mine can't tell one battery from another If it's bad just quietly swap it out!!?

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battery, trailer, winter

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