Good Sam Club Open Roads Forum: Dinghy Towing: Car battery
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Janss

Sedona, AZ

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Posted: 03/23/19 09:39pm Link  |  Quote  |  Print  |  Notify Moderator

Really didn't know where to post this.

We tow a car and leave one at home. My question is about the one left at home. If we are gone 4-6 months at a time, is it okay to disconnect the battery and leave it sit for that long? And which should I disconnect....negative only, positive only, or both?

I want to know if the battery will likely still work when I reconnect it after that long unattended. And is it very bad for the health of the battery? This battery is about a year old. (That's because we left one hooked up previous summer that was already a few years old [emoticon]

Any other suggestions, besides having someone drive it now and then?


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rk911

Wheaton IL

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Posted: 03/23/19 09:45pm Link  |  Quote  |  Print  |  Notify Moderator

Janss wrote:

Really didn't know where to post this.

We tow a car and leave one at home. My question is about the one left at home. If we are gone 4-6 months at a time, is it okay to disconnect the battery and leave it sit for that long? And which should I disconnect....negative only, positive only, or both?

I want to know if the battery will likely still work when I reconnect it after that long unattended. And is it very bad for the health of the battery? This battery is about a year old. (That's because we left one hooked up previous summer that was already a few years old [emoticon]

Any other suggestions, besides having someone drive it now and then?

we put ours on a battery minder. keeps the battery topped off.
http://www.batteryminders.com


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Viewfinder

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Posted: 03/23/19 10:03pm Link  |  Quote  |  Print  |  Notify Moderator

With a fully charged battery, air up your tires and disconnect the battery ground.
As a snowbird, am out 6 months or more at a time. Don't have power for a battery minder where the car is. Both ways work fine.

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owenssailor

Ontario

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Posted: 03/23/19 10:26pm Link  |  Quote  |  Print  |  Notify Moderator

The tow batteries in our boat and the one in the Miata and the one in the John Deere sit in place all winter with the Neg lead disconnected. The batteries are always fine after 5 month.


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garym114

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Posted: 03/24/19 07:08am Link  |  Quote  |  Print  |  Notify Moderator

The battery is far better off if you just disconnect the ground cable.


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Janss

Sedona, AZ

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Posted: 03/24/19 09:28pm Link  |  Quote  |  Print  |  Notify Moderator

Perfect! That's what I wanted to hear about. I will disconnect the negative.

I never felt good about leaving a battery minder plugged in while I am gone. Just never know what could happen...connection unexpectedly heats up, rats in my carport chewing wires, etc.

time2roll

Southern California

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Posted: 03/24/19 10:19pm Link  |  Quote  |  Print  |  Notify Moderator

+1 to just disconnect. Although if you have a small charger you may want to put it on and top off that battery for 1 to 3 days before you roll.


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Janss

Sedona, AZ

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Posted: 03/24/19 10:40pm Link  |  Quote  |  Print  |  Notify Moderator

You mean that's better (or more definitive) than just driving the car for several days before we leave?

imgoin4it

Alamogordo, NM USA

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Posted: 03/25/19 05:13pm Link  |  Quote  |  Print  |  Notify Moderator

A lot depended on the car. Some use power even when off. Automatic headlights on some use electricity power. So does a remote start . Disconnect the negative battery and take off,


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Flapper

Minnesota

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Posted: 03/25/19 09:06pm Link  |  Quote  |  Print  |  Notify Moderator

Don't forget about battery self discharge. Even unplugged they will lose charge. It all depends on the average temperature. Here in Minn over the winter, we can go easily the entire winter, and still be at 90% of charge. If the avg temp in Arizona when you are gone is 105, then you maybe have about 4 mos. before they hit the 50% mark. Now 50% is the recommended lowest they should go for longest life, but you can go more. Just plan on putting them on a charger when you get back. Or move them indoors, where at 70, they can go almost 15 months before getting to 50%.


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