What new battery for my 1986 CJ-7? - JeepForum.com

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post #1 of 9 Old Yesterday, 08:22 AM Thread Starter
Anith
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1986 CJ7 
 
Join Date: Mar 2012
Location: Rome
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What new battery for my 1986 CJ-7?

I need to urgently replace the old battery of my 1986 CJ-7 258 cid with a new one.

I do not run my CJ more than 25 miles a day and use starter 3 or 4 times a day. I rarely use the Jeep after dark. I do not have electric winch or additional lights, etc.

However, I would like to have a powerful battery in the Jeep. Up to what Ah and CCA could I go in a battery without risking any electrical damage to alternator or any other parts? The temp here does not go below 35 F in winter.

Suggesting brand names of batteries may not help as we don't get the batteries here in Europe that you find in the U.S.

Cheers!

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post #2 of 9 Old Yesterday, 08:29 AM
Dave884x4
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1981 CJ7 
 
Join Date: May 2016
Location: Sugar Land
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I have a red top optima that does amazing and is almost 7 years old now. My CJ is my daily driver and I have a bunch of electrical accessories, always has a powerful crank, hot or cold.

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post #3 of 9 Old Yesterday, 11:26 AM
RevDrCueBall
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Honestly, why do you want such a big battery? For what you're doing, the stock size and CCA should be more than sufficient for years to come.
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post #4 of 9 Old Yesterday, 02:59 PM
CSP
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A large capacity battery isn't going to damage anything. The electrical system will only demand so much power, it isn't "forced" into parts that don't need it.


That said, I would agree, get one that's specified for your CJ.
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post #5 of 9 Old Yesterday, 03:15 PM
258
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Odyssey Extreme 34/78
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post #6 of 9 Old Yesterday, 06:44 PM
CrustySprings
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1985 CJ7 
 
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I use a group size 24F battery in my '85 CJ 7. I'm partial to Interstate brand batteries but I have no idea whether or not they are available in Europe. Good luck with your search.

258 cu. inch six, Team Rush ignition upgrade, T5, Dana 300, Superwinch lockouts, Black Diamond 3" suspension lift, greasable shackles, poly bushings, JKS quick discos, 32x11.50x15 Cooper STT's, American Racing 23 15x8 alloys, Uniden Pro 520XL CB radio, 2' adjustable tip Firestick antenna, Viair 460 onboard air system
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post #7 of 9 Old Today, 02:22 AM
BagusJeep
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Batteries are physical sized. A CJ standard battery tray takes a size 34/78, that is 10" x 6.88" x 7.63" LxWxH and can be purchased with Amp Hours (AH): 50 and CCA: 800

There is no way a stock CJ used regularly as you do would need anything larger. The largest load is at the starter, apart fro that a good alternator will just be charging the battery all the time.

You can change the battery tray to put a larger battery in there if you want, they are not expensive, but if you need very large reserves or security of two batteries it is easier to put a second tray in and run 2 x 34/78.

If you want a more rugged battery, ask at your local tractor dealer. Farm machinery and construction equipment need batteries with stronger terminals and plates as they suffer more vibration.

I buy gel batteries now, the flooded cells were a pain in the heat.

BagusJeep lives in Bali.

1981 CJ7 258ci - Bagusjeep
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post #8 of 9 Old Today, 06:27 AM
Matt1981CJ7
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I use group 34/78, as well. The extra posts on the side are handy for smaller accessories.

Matt
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post #9 of 9 Old Today, 02:46 PM
roadhog304
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I run 34/78 batteries interstate brand in everything I own except for the wife's ranger. Dang thing has to be the only vehicle that has a different size. In my truck and cj5 I have the vehicle electrics hooked up to the side posts and then I use the top posts for the winch.

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