I don't know if this will be useful to anyone else, but I've been annoyed for a long time that the battery for '02 and '03 KJs is (a) not available at Costco and (b) so weak.

So, today I was at Costco looking at Optimas. They're up to $140 now--a bit rich for my blood. So I looked at the Kirkland Signature batteries and decided to try a Group Size 25 (Fitment Guide #6) battery.

These batteries have a 36 month replacement/100 month prorated warranty, 600+ CCA (compared to 525 CCA stock), and they fit PERFECTLY. They're just under an inch longer and a little bit taller, but they sit nice and snug in the battery tray.

And they're only $44--less than 1/3 the cost of an Optima. Not bad, if you have a Costco membership and don't feel like you really need an Optima.

As a disclaimer, I should mention that Consumer Reports has published ratings for a bunch of batteries, and Kirkland Series always seems to show up between the bottom and the middle of the pack, although they don't rate Group 25. On the other hand, it's easy to return stuff.

Incidentally, I just barely replaced the original battery after almost 6 years of ownership. It was still working, just not turning the engine over as energetically as it once did. And a mechanic buddy of mine said you should replace your battery every 3 years.

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09 Yellow JK Rubicon LOST #TY050608
TeraFlex 4" long arm lift, 35" BFG KO2s, Tatton driveshaft, Riddler diff covers, RIPP headers,
MBRP off road exhaust, Cobra C75WXST, Little Passengers 3rd row seat
Formerly: 02 White Ltd 4x4 with lots of stuff...
Pics: http://troysterr.com Links & Parts: http://youngs.org/kjparts

I replace mine every 3-4years. I have heard it also helps gas mileage because older batteries put more of a toll on the alternator since they need to gcharge more often.

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2006 Jeep Liberty 65th Edition, 4x4, Auto
Mopar Borla Single Side Exhaust
Mopar Full Skids and Tow Hooks

1991 Pontiac Firebird, 305TBI w/ 5 spd manual, Black w/ T-Tops, Pretty much all stock

Thanks for the Tip! (heads to costco)

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02 Liberty Limited
Silver Outside & Taupe Inside
Heated Seats, Sunroof & Infinity speakers
USA Spec I-Pod adaptor, Mopar Sub, Garmin GPS
Tow Package, Select-Trac
Rock Rails, Tow Hooks

Maybe a bit off topic

But what is Costco? I have never seen one but found out there is one not too far away. Is it like Sam's club?

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It may be that your only purpose in life is to serve as a warning to others.

06 CRD Sport
Built 5/11/06
Jeep Green
Rocklizard diff cover
V6 Airbox

It is better than Sam's Club in my opinion, but granted I have a bias against Wally World as they are trying to shoehorn a Super Walmart onto a 26 acre piece of land directly bordering my property. I would get to have the auto service center on my side to boot.

But yes, Costco is a warehouse club very similar to Sam's Club. We have both here in the Chicagoland area. BJ's Wholesale Club is another version I have heard about in other areas.

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2008 Unlimited Rubicon - 3.5" AEV/Nth lift - 35" MT/R with Kevlar - AEV Wheels - York OBA
2008 Patriot - Fuel Saver