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Old 09-14-2010, 07:32 PM   #1
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What is the correct amp for new battery?

On the battery I have it says the amp specs are CA-540 and CCA-675. Got it tested today after having more problems with the Jeep not cranking but everything else like the lights and radio working. The guy that tested my battery said it is fully charged but only putting out half the cranking amps that it should be and that I need a new battery. He also said the cranking amp specs on this battery should be more. Does anyone know how many amps the new battery I'm about to go get should have? I have no additional lights other than stock, no sound system other than an in-dash cd player, no winch, no lockers.

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Old 09-14-2010, 08:10 PM   #2
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check the owners manual...

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Old 09-14-2010, 08:54 PM   #3
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The owners manual doesn't tell you crap. My build sheet says mine came with a 500A battery. For what it's worth I'd go with the biggest battery that will fit in the tray. IMO you can never have too much battery. A good replacement one that is often referred to on this forum is a Diehard 3478DT or 3479DT Group 34.
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Old 09-14-2010, 09:09 PM   #4
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750 CCA (cold cranking amps) is the smallest capacity I would go with for a Jeep. You want a Group 34 size battery and the Diehard Platinum 3478-DT is a good choice. Don't forget the word Platinum if you ask for the above recommended Diehard 3478-DT, it is actually the Diehard Platinum 3478-DT that is the battery being recommended.
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Old 09-14-2010, 09:33 PM   #5
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750 CCA (cold cranking amps) is the smallest capacity I would go with for a Jeep. You want a Group 34 size battery and the Diehard Platinum 3478-DT is a good choice. Don't forget the word Platinum if you ask for the above recommended Diehard 3478-DT, it is actually the Diehard Platinum 3478-DT that is the battery being recommended.
Do you recommend that over the regular size 34 because of the additional posts or is there a difference? Just curious, for the future...
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Old 09-14-2010, 09:54 PM   #6
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I appreciate the responses. I wasn't sure where to get a Diehard and only had 20 minutes to get one so I grabbed a DuralastGold from autozone. (*** 800 cold cranking Amps (1000 cranking Amps) *** 105 reserve minutes. -> 3 year free replacement <-). Haven't ever used a duralast but figured with the warranty it comes with it can't be that bad of a purchase??
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Old 09-14-2010, 10:08 PM   #7
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I appreciate the responses. I wasn't sure where to get a Diehard and only had 20 minutes to get one so I grabbed a DuralastGold from autozone. (*** 800 cold cranking Amps (1000 cranking Amps) *** 105 reserve minutes. -> 3 year free replacement <-). Haven't ever used a duralast but figured with the warranty it comes with it can't be that bad of a purchase??
You'll be using that warranty once a year! Hopefully not, but that's been the case for every duralast battery i've ever used! Same applies to the walmart battery.
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Old 09-14-2010, 10:13 PM   #8
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Cca only needs to e a minimum the bigger the better in my opinion. Longer to realize your lights are still on.
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Old 09-14-2010, 10:32 PM   #9
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You'll be using that warranty once a year! Hopefully not, but that's been the case for every duralast battery i've ever used! Same applies to the walmart battery.
Ah man, lets hope not. The one I'm replacing was from walmart and it lasted me 3 years....hopefully this one will last that long too.
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Old 09-14-2010, 10:33 PM   #10
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Do you recommend that over the regular size 34 because of the additional posts or is there a difference? Just curious, for the future...
I'm curious about this too...
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Old 09-14-2010, 11:02 PM   #11
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The additional posts on the side are just a nice thing to have. You can buy a Diehard Platinum 3478 without them, the "DT" stands for Dual Terminals.
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Old 09-15-2010, 12:35 AM   #12
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The Platinums arnt as good as you think (seeing I work at a sears auto) Id say at least half of the ones we sell are back in a year, its good they have a 4 year free replacement because most people end up using that warrenty a few times but what do I know I just work there lol our golds are good batteries I have seen those go 8-10 years before. I'm going to try a AGM dual post from O'Reilly Auto Parts for my next battery, its dual terminal, 3 year free replacement and about $50 less then the platinum at sears
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Old 09-15-2010, 12:43 AM   #13
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That's interesting...I'm not calling you a liar, but the general consensus is the Diehard Platinum is a rebadged Odyssey which is one of the best batteries you can buy...and is recommended by most of the guys who do serious winching. So which is it...?
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Old 09-15-2010, 01:13 AM   #14
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Well.....installed the new battery and still nothing in regards to turning the engine over. Still have lights and radio though. Is it going to be my starter afterall?

I attached the link below because I started a thread recently regarding the symptoms my Jeep has been having and thought that info may be helpfull to anyone that wants to help me out here...

http://www.wranglerforum.com/f5/its-...ead-59960.html
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Old 09-15-2010, 09:21 AM   #15
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That's interesting...I'm not calling you a liar, but the general consensus is the Diehard Platinum is a rebadged Odyssey which is one of the best batteries you can buy...and is recommended by most of the guys who do serious winching. So which is it...?
For the standard and gold diehards sears just switched manufacturers from johnson controls and now its east penn. As for the platinum I'm not sure who makes them and the manager isn't here to ask right now. Again just speaking from what I've seen at one time we had so many waiting to send bac and they only accept so many of those to be returned a month we had to stretch it out over 3 months. The platinums are supposed to have more cca and reserve capacity when in reality some of our golds are rated higher
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Old 09-15-2010, 11:20 AM   #16
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Odyssey makes the Diehard Platinum BowlerGT, and Odyssey is probably one of the very best manufacturers of batteries out there. Their claim to fame is the long history of excellent reliable mil-spec batteries they make for the military.

It's a good thing that Diehard switched away from JCI for their standard and Gold Diehards. Optima was purchased by JCI sometime back and their quality has taken a nosedive, especially after their manufacturing was moved to Mexico.

So far as the Diehard Platinum goes, my crowd started running them since they were easier to find than the Odyssey batteries that had proven to be ultra reliable. I had a Diehard Platinum 3478-DT in my '97 TJ that was stolen and I loved it, I will be installing one into my replacement '04 as soon as I can find a spare $180.
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Old 09-15-2010, 01:15 PM   #17
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Starter was the problem....back in business now.
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Old 09-15-2010, 01:44 PM   #18
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750 CCA (cold cranking amps) is the smallest capacity I would go with for a Jeep. You want a Group 34 size battery and the Diehard Platinum 3478-DT is a good choice. Don't forget the word Platinum if you ask for the above recommended Diehard 3478-DT, it is actually the Diehard Platinum 3478-DT that is the battery being recommended.

Sorry, forgot the word "platinum". Do they make a "non platinum" 3478DT? What's the difference between the Diehard 3478DT and the 3479DT?
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Old 09-15-2010, 04:36 PM   #19
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Thumbs up Try NAPA batteries

I have put NAPA batteries in 5 consecutive vehicles I've owned and they have been very reliable. I have never had to return one for any type of warranty service, but I do generally buy their premium line (not AGM though). I just installed an 8434 (84 month 'Legend') into my '06 Rubi after the factory-supplied battery began to leak acid out of one of the vents (4+ yrs old) , causing my positive terminal to begin to corrode. I thoroughly cleaned the battery tray, all terminals and finished off the replacement with battery terminal protectant (red spray-on sealer stuff) which will hopefully prevent major concerns in the future. Of all the different trucks I've owned Jeeps always gave me the most battery troubles, probably due to the 'openness' of the Jeep engine compartment and the relatively rough conditions they end up seeing. P.S.: I have NO affiliation with NAPA whatsoever.
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Old 09-15-2010, 04:51 PM   #20
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The problem with conventional batteries happens when they are used offroad much. If a Jeep is a street Jeep or it only sees gentle trails, a standard battery like NAPA's will usually hold up fine. But for a Jeep that sees lots of tough bumpy rough trails and roads, it really takes an AGM battery to hold up.
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Old 09-15-2010, 05:15 PM   #21
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The problem with conventional batteries happens when they are used offroad much. If a Jeep is a street Jeep or it only sees gentle trails, a standard battery like NAPA's will usually hold up fine. But for a Jeep that sees lots of tough bumpy rough trails and roads, it really takes an AGM battery to hold up.
One thing I just noticed you are in southern california, I'm in northern ohio, we get lots of snow and freezing temps throughout winter. Thats a big difference on batteries which might explain why the platinums dont do as well up here. And yes for the bumpy trails agm (absorbed glass matt) is better then the standard acid, you can mount a platinum in and position except upside down.

To answer 03 Rubi's question, sears no long carries a non platinum 34/78 battery. They used to have one in a "suv" battery but that is no longer made.
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Old 09-15-2010, 07:39 PM   #22
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A quality AGM battery including the Diehard Platinum has no issues with cold weather, none whatsoever. And an AGM battery can be mounted in any position including upside-down.
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Old 09-15-2010, 08:39 PM   #23
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Again please. What's the difference the 3478DT and the 3479DT?
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Old 09-15-2010, 08:46 PM   #24
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Danged if I know.
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Old 09-15-2010, 09:25 PM   #25
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Again please. What's the difference the 3478DT and the 3479DT?
I dont know of a 3479. The 34 is the group size that fits in the wrangler and has the top terminals. The 78 is actually a GM style battery with side terminals, can also be a 75 which is a little bit smaller then a 78
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Old 09-16-2010, 08:30 AM   #26
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Cold weather is hard on the battery. More joules to start the engine, and damage to a low or partially charged battery in extremely low temperatures.
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Old 09-16-2010, 08:33 PM   #27
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Thought I saw "3479DT" in a post concerning batteries a few months back and so had it in my notes for future reference. Must have been another brain fart.

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