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Old 12-15-2012, 06:13 AM   #1
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Disconnect battery?

Should I disconnect the battery on the vehicle left sitting in the garage while we are out RVing? We will be gone about 6-8 weeks. (First trip in our new to us 2012 Four Winds 28a.)

2006 Fleetwood Excursion 39S
350 C7 Cat, 6 SPD Allison
2008 Honda CRV
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Old 12-15-2012, 06:21 AM   #2
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Hello, you would be better to put a battery tender on it. It will pay for itself over the life of your auto battery.

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Old 12-15-2012, 06:32 AM   #3
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longest we have been out is about 6 weeks did nothing for the vehicle left behind'it started fine the fist trip it made after arriving home was to the lincoln dlr for an oil change
the diagnostics said battery preformance was low i said thanks i will bring it back if any problems there were none and the in truck diagnostics said all systems OK after a few day of driving. the truck was an 06 mkt w57000 miles original battery
so i would not worry
just liven life in east tn or where ever our
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Old 12-15-2012, 06:36 AM   #4
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Hi Littlelake95,
Welcome to iRV2. For me, I do not do this. However, it may depend on the brand of car. The car we leave, for several months at a time, auto disconnects most of the parasite voltage draws, over time, if the car is not used. If you will sleep better at night knowing the battery is disconnected, then do it. You can hurt nothing. My neighbor disconnects his battery when he is gone for several months at a time.
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Old 12-15-2012, 08:13 AM   #5
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Thanks for the responses. We just bought our first MH. We have "tested" it on two different two nite trips here in MI. We are planning a much longer trip to AZ shortly. I am glad I found this forum so I don't have to depend on "trial & ERROR" to figure all this new stuff out!!
2006 Fleetwood Excursion 39S
350 C7 Cat, 6 SPD Allison
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Old 12-15-2012, 10:29 AM   #6
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The longest I have left a battery "unattended" was 9 months. I disconnected the negative post and left it in the vehicle. Came back, hooked it up and the truck started right away. If your battery is fairly new, you can leave it but if it more than a couple of years old, then I would put a tender on it.
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Old 12-15-2012, 10:55 AM   #7
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If your radio has a security code make sure you know it when you disconnect the battery.
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Old 12-15-2012, 10:56 AM   #8
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I'd disconnect it.

Every car, and battery, is different and the small amount of time to disconnect it is better than the hassle of having to charge it.
2004 Monaco La Palma 36DBD, W22, 8.1, 7.1 MPG
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Old 12-15-2012, 11:10 AM   #9
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Originally Posted by Arch Hoagland View Post
I'd disconnect it.

Every car, and battery, is different and the small amount of time to disconnect it is better than the hassle of having to charge it.

X2, on the lot at the dealership where I worked , no starts,due to dead battery, would occour in as little as 3 weeks.
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Old 12-15-2012, 12:19 PM   #10
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I finally started using a battery tender. No more resetting the clock or stereo presets.
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Old 12-15-2012, 02:51 PM   #11
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You have to be a little careful with disconnecting the battery on today's modern cars; they have computers in them that "learn" your driving style and make modifications to everything from shift points to engine control of timing and fuel delivery. If you disconnect the battery, the automobile's computer has to "re-learn" all of that information and fuel efficiency usually suffers and the "learning curve" can be 500 miles or more to get back to what you originally had.

Best bet is to install a Battery Minder or Battery Tender; they have quick attach components that make hook up a breeze and they will keep the battery charged and desulfated. No "re-learning" for the computer, no lost radio stations or other "customizations" (a lot of the new "radios" are highly customizable, even more so with built-in GPS units, etc.). All of my equipment is outfitted with one, from my lawnmower to my antique cars and my daily drivers, even my emergency generator with electric start; if they aren't going to be used in a week, they get hooked up. The battery in my JD tractor is 13 years old and starts the tractor like it is new.


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