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Open Roads Forum  >  Tech Issues

 > group 65 vs group 31 battery for mtr hm maxx brand

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desertratt1

tucson

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Posted: 09/12/20 10:31am Link  |  Quote  |  Print  |  Notify Moderator

I have a 1997 Beaver Monterey it has been stored for a few years in RV park in white mtns az. I am up here to try get motorhome back to Tucson and looks like all the batteries are shot. I have two napa 7236 batteries group 31 and have threaded post. I have 4 6 volt orielly batteries gs100tj same as a gs2 they say 115 min on them. I have had excellent luck with the maxx batteries from walmart got 10 years out of the pair on my dodge cummins. I called the local walmart they havee a group 65 not a group 31 like the napa battery and it has regular post not threaded post. I was thinking of just getting post adapters and buying these as they have 3 year full replacement warranty i called napa they have 18 mo and some only have 12 mo. Plus walmarts are everywhere. Same with the GS2 they are 98.00 oh and so is group 65battery 98.00 . Any advice or thoughts on this ?

Thanks in advance..

Lwiddis

Near Annett’s Mono Village, Bridgeport, CA

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Posted: 09/12/20 10:43am Link  |  Quote  |  Print  |  Notify Moderator

After a few years of storage it’s not a mystery why your batteries are shot. Not clear whether you are buying house batteries, engine starting batteries or both. They are different. Are the MH’s tires safe?


Winnebago 2101DS TT & 2020 Chevy Silverado 1500 LTZ Z71, 300 watts solar-parallel & MPPT, Trojan T-125s. TALL pole for flags. Prefer USFS, COE, BLM, NPS, TVA, USF&WS, state & county camps. Bicyclist! 14 year Army vet - 11B40 then 11A - (MOS 1542 & 1560)


jdc1

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Posted: 09/12/20 11:08am Link  |  Quote  |  Print  |  Notify Moderator

Costco or Sam's Club.

Birdnst

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Posted: 09/12/20 11:33am Link  |  Quote  |  Print  |  Notify Moderator

Don't have information handy, however look up group sizes due to the fact that is the physical dimensions of the battery. LxWxH


If you cannot take good care of what you have, you will not have anything good for very long!!!

time2roll

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Posted: 09/12/20 11:43am Link  |  Quote  |  Print  |  Notify Moderator

Group 65 is a fairly common start battery. Group 31 is more often deep cycle.

So yes get a 65 for the chassis and a 31 for the house. Adapters are fine if needed.


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MrWizard

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Posted: 09/12/20 02:58pm Link  |  Quote  |  Print  |  Notify Moderator

I have used screw in adapters
I have some in my electrical tool bag right now
They work fine,


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MEXICOWANDERER

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Posted: 09/12/20 04:12pm Link  |  Quote  |  Print  |  Notify Moderator

Group 65 is automatically an engine starting battery. First consideration: Engine type Diesel need glow plug then engine cranking ability. 2nd Life in Minneaota is polar opposite to say sothern Texas.

The 65 is a low profile battery like a group 78. Low and wide. I would recommend time with a tape measure and then make sure the battery post polarity and location agrees with the length and orientation of your battery cables.

midnightsadie

ohio

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Posted: 09/12/20 06:38pm Link  |  Quote  |  Print  |  Notify Moderator

worry more about the tires,and wal mart batteries will do.

desertratt1

tucson

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Posted: 09/16/20 03:24pm Link  |  Quote  |  Print  |  Notify Moderator

i want to thank everyone for their input i went with the group 31 die hard commercial batteries as walmart was out of batteries so just decided i needed to move forward.


rick

jkwilson

Indiana

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Posted: 09/16/20 03:49pm Link  |  Quote  |  Print  |  Notify Moderator

Those group 31s are commercial starting batteries. They are readily available for a reasonable price at virtually any auto parts place. Their cranking power will put a group 65 to shame.


John & Kathy
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