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Old 07-09-2014, 11:57 AM   #1
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battery!

This is mostly just to vent...So I purchased my 2012 JKUR a couple weeks ago and today when I started to leave for lunch my Jeep wouldn't start!

Acted as if the battery was dead.... so I got a jump and went straight for AutoZone (about 15-20 min drive). Turned it off, tried to start it again and nothing.

I had them test the starter/battery/alternator, battery was dead. So I got to spend a nice chunk of money during lunch : retested and alternator and starter came back good.

I checked and didn't see any doors open, lights on, dash was off. i'm seriously hoping it was just a bad battery but is their anything else I should be looking for? I.E. my mustang if it sits for a week without being started... battery is dead.

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Old 07-09-2014, 12:21 PM   #2
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The same thing happened to me this morning. It cranked once then wouldn't turn over. Jumped it and it started immediately. After I let it run a few minutes I turned it off and it barely re-started. My engine check light came on and my ETC started flashing, so to the dealership we went. It ended up only being the battery, but I wanted the all-clear just in case.

Have your dealership do a courtesy check, especially since you've only had the Jeep a few weeks.

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Old 07-09-2014, 12:26 PM   #3
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It should just be the battery. They do sometimes fail early. I had a battery from AutoZone that only lasted me about 18 months. It was just a faulty battery and they gave me a new one free since it was still under warranty.
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Old 07-09-2014, 12:32 PM   #4
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Was it the original OEM battery from the factory or a replacement
Factory issue battery tends to last longer than replacement battery
For me replacement batteries tend to go 3-5 years; where as the OEM lasts 5-8 years
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Old 07-09-2014, 12:40 PM   #5
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Mine was the original and just like the OP I have a 2011.
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Old 07-09-2014, 12:58 PM   #6
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Any issues with the new glass mat batteries?

One of the first "mods" I usually do to all my vehicles is to replace the battery with the highest capacity one I can find that will fit. This saved my bacon 20somehting years ago when the ignition system on my YJ got soaked while I was blasting through mud puddles and shut off the engine to make sure there was no permanent damage - then could not restart it until it dried-out 1/2 hour later (lots of "OK try starting it now"...crank crank crank, wait a few minutes to let the starter cool..."OK try starting it now" crank crank crank, etc.)
However, I have been tempted by the claims of the new glass mat ones (disclaimer - my employer sells the glass to at least some of the companies making them, so I am not entirely neutral here) and am wondering if they actually are worth the extra money.
I have done some casual in-store comparisons and it seems like they cost more and generally don't have as high of amp ratings as a standard battery.
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Old 07-09-2014, 02:46 PM   #7
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Battery

Hi, My battery went out at about the 2 year mark, got a jump from AAA, went to dealer got a new FREE Battery no more problems, If you have more problems forget auto zone and just go to your dealer I am sure your
2012 is under factory warranty.
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Old 07-09-2014, 05:27 PM   #8
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My 12 did the same thing on Mothers day no less at a restaurant at 9pm had to have it towed to the dealer it was the battery and it would not Jump start still in the 3/36000 and they replaced it with a new 72month Mopar battery FREE FREE FREE love it.
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Old 07-09-2014, 06:43 PM   #9
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I got a 2012 JKU, bought new...Never had an issue with the battery, but saw a few people saying their stock,new batteries were shot after 2 years?? That don't sound good, should I be looking to replace after only a couple years?? Never had a battery take a dump 2 years unless other issues. Just a question, I don't want to get stuck somewhere, but 2 years seems ridiculous for a battery from new. Third Jeep, usually last a good 5-7 years.
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Old 07-09-2014, 07:09 PM   #10
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Quote:
Originally Posted by firehawk View Post
Hi, My battery went out at about the 2 year mark, got a jump from AAA, went to dealer got a new FREE Battery no more problems, If you have more problems forget auto zone and just go to your dealer I am sure your
2012 is under factory warranty.
My jeep is just outside the 36000 mile warranty... just awesome. I plan on adding a winch soon so i would've had to upgrade anyways. I got the duralast platinum, 760 Cold Cranking Amps & 120 mins reserve (comparable to the optima glass mat).
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Old 07-09-2014, 07:44 PM   #11
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My wife's 2013 JKU factory battery was failing at 20 months. I replaced it and it now started immediately.

Low bid costing, relentless central Arizona summer temperatures, etc. took their toll. It is the cost of ownership and as long as all my Jeep problems are like this, I am as happy as can be. $150 and 30 minutes of my time to repair it is nothing.
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Old 07-09-2014, 08:22 PM   #12
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I'm just waiting for mine to go bad. It's oem in a 12. Been in severe cold (-60+) have a winch on it. And now I'm in the extreme heat. Counting down ......
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Old 07-09-2014, 08:30 PM   #13
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My 2012 delivered 11/11/11 has 63,397 miles and never a battery issue. Should I buy a battery? If so which one?
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Old 07-09-2014, 09:00 PM   #14
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Originally Posted by 2five22 View Post

It is the cost of ownership and as long as all my Jeep problems are like this, I am as happy as can be. $150 and 30 minutes of my time to repair it is nothing.
I must say I was quite relieved to find my problem was just a battery. Not that's I'm afraid to go there, but dealing with electrical issues are a major pain. I just turned 50K miles and have had great luck with my JKU so far besides this. Runs like a champ!
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Old 07-10-2014, 04:05 AM   #15
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Quote:
Originally Posted by coleblk View Post
This is mostly just to vent...So I purchased my 2012 JKUR a couple weeks ago and today when I started to leave for lunch my Jeep wouldn't start!

Acted as if the battery was dead.... so I got a jump and went straight for AutoZone (about 15-20 min drive). Turned it off, tried to start it again and nothing.

I had them test the starter/battery/alternator, battery was dead. So I got to spend a nice chunk of money during lunch : retested and alternator and starter came back good.

I checked and didn't see any doors open, lights on, dash was off. i'm seriously hoping it was just a bad battery but is their anything else I should be looking for? I.E. my mustang if it sits for a week without being started... battery is dead.
The battery might be your only problem but you can't test it properly the way they did.
They wanted to sell you a battery so their test method failed the battery.

You have to charge it properly, overnight, let it rest, and then test it. And you can't test the charging system without a properly charged battery installed.

Charging & Testing Your Battery- Do it now! | OPTIMABATTERIES

Tech Tips 7: Does my battery need to be replaced? - YouTube
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Old 07-10-2014, 08:57 AM   #16
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Quote:
Originally Posted by Hilldweller View Post
The battery might be your only problem but you can't test it properly the way they did.
They wanted to sell you a battery so their test method failed the battery.

You have to charge it properly, overnight, let it rest, and then test it. And you can't test the charging system without a properly charged battery installed.

Charging & Testing Your Battery- Do it now! | OPTIMABATTERIES

Tech Tips 7: Does my battery need to be replaced? - YouTube
I typically trust Autozones battery test... at least for the most part. Coming from someone who's alternator went out on my mustang every 6 months I was use to having my battery drained and then a short trip over to autozone they were able to tell me good/bad. Only had a bad battery once or twice in 10 years.
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Old 07-10-2014, 12:23 PM   #17
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That factory battery seems to average 2-3 years. Pathetic but true. Very common for them to go in that time frame. I will admit I was surprised it was even covered under warranty- but for those outside of that time frame its a pain.
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Old 07-10-2014, 12:38 PM   #18
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In Arizona, we typically look at batteries as a 2.5 year wear part... That's about how long many of them last. A couple of years ago, I had a battery explode under the hood of my Mercury Mountaineer, in the garage over night with only 1500 miles on it, what a freakin' mess that was.
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Old 07-15-2014, 09:39 AM   #19
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HAHAHAHAHA!!! I totally jinxed myself... Yesterday morning, DEAD Jeep. Call to the dealer and in it went and got a battery replacement under warranty.

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Old 07-15-2014, 11:02 AM   #20
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BAH-TUH-RAY! But seriously, batteries usually last only about 3 years. That's their expected life. In my previous car, a Mazda rx8 I replaced the dying battery with an Optima red top. Those are freaking awesome! -20 multiple times this winter in ohio. No problem. 1 crank and run. If you buy a new battery spend the extra and buy an optima.
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Old 07-15-2014, 11:25 AM   #21
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The factory installed batteries, are 600 ca, and marginal at best.

Click image for larger version

Name:	AutoLTVcutaway battery.gif
Views:	26
Size:	70.4 KB
ID:	1304834

^^^If you want a quality 900 ca battery that will last long term, then this is the one. Very expensive, but you can rely on it.....
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Old 07-15-2014, 02:00 PM   #22
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The factory installed batteries, are 600 ca, and marginal at best.

Attachment 1304834

^^^If you want a quality 900 ca battery that will last long term, then this is the one. Very expensive, but you can rely on it.....
I went with the Duralast Platinum, has 875 ca and 730 cca with 120 min reserve. I've had decent luck with duralast. I'll keep this one in mind for the future though.
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Old 07-15-2014, 03:05 PM   #23
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This one was warranty (free), but I will replace with a premium battery when it is needed.
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Old 07-15-2014, 07:46 PM   #24
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This has been posted many times about 35% of all Jeep battery's are bad. My 2012 has had 2 in a row replaced. I finally just paid for a battery I don't want to be stranded in some town with no Jeep dealership. There battery's are made in India and the cell plates are decomposed when they are built. Jeep and 4 other car makers have a 10 year contract with them so nothing is going to change anytime soon. Yes Jeep will replace your bad battery but your still taking that risk of getting another bad one. Where I wheel not only is there no Jeep dealer there is no any dealer.

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