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754 Posts
Two months ago I noticed my ESS was not working as frequently, then quit altogether with a 'Battery Charging' message on the display. I cleaned the battery terminals but that didn't help. With load tester, the battery tested OK but not by a lot.
Yesterday I was out running errands and the Jeep cranked slow and nearly didn't start. I took it straight home, checked the battery again and this time it just dipped into the bad zone on the tester. This is at 66,250 miles and a month under three years since new (I like driving this Jeep!). Can't complain but I would have liked to have gotten another year or two out of it.
I learned on this site (thank you!) that Advance Auto and Exide have good AGM batteries in the 94R size. Advance was $222 but my local parts store said they'd sell me an Exide AGM for $165. I thought that was cheap and it was. The counter guy made a mistake and it should have been $225, but he honored the price when I picked it up today.
I was expecting a two-handled, blue-topped battery like on the web sites but this had a black top and one handle. It is the right battery; rated 800 CCA and has a 48 month free replacement warranty, so they must have changed the style.
I pulled the old battery last evening and replaced it today so I was expecting error codes from the battery being out for about 18 hours. I got a few (4WD, Lane assist, etc.) but they all went away right after I started driving. The ESS still isn't working but the new battery has to charge a bit.
Incidentally, in the month or two when the ESS wasn't working, I didn't notice any drastic change in my gas mileage. No scientific study but I just watched the display. It stayed at 21-22 in mixed driving. I'm a big ESS fan but have to admit I thought it would make more of a difference.
Yesterday I was out running errands and the Jeep cranked slow and nearly didn't start. I took it straight home, checked the battery again and this time it just dipped into the bad zone on the tester. This is at 66,250 miles and a month under three years since new (I like driving this Jeep!). Can't complain but I would have liked to have gotten another year or two out of it.
I learned on this site (thank you!) that Advance Auto and Exide have good AGM batteries in the 94R size. Advance was $222 but my local parts store said they'd sell me an Exide AGM for $165. I thought that was cheap and it was. The counter guy made a mistake and it should have been $225, but he honored the price when I picked it up today.
I was expecting a two-handled, blue-topped battery like on the web sites but this had a black top and one handle. It is the right battery; rated 800 CCA and has a 48 month free replacement warranty, so they must have changed the style.
I pulled the old battery last evening and replaced it today so I was expecting error codes from the battery being out for about 18 hours. I got a few (4WD, Lane assist, etc.) but they all went away right after I started driving. The ESS still isn't working but the new battery has to charge a bit.
Incidentally, in the month or two when the ESS wasn't working, I didn't notice any drastic change in my gas mileage. No scientific study but I just watched the display. It stayed at 21-22 in mixed driving. I'm a big ESS fan but have to admit I thought it would make more of a difference.