Never thought about it just being an idiot light. Wow. Always wondered why the dash gauge said 14volts but the battery never read 14.
AGM vs. flooded lead acid batteries
- Thread starter TJ Jim
- Start date
Or have a vehicle with real gauges like , 02 and older , before our German friends " improved " the TJ .
no LJ in '02 so to hell with that
I'm into this one a little over a year now
https://www.oreillyauto.com/detail/...gm/v/a/2324/automotive-suv-2000-jeep-wrangler
It was only $148 to my door, tax included, when I ordered it online. My charging system seems to charge between 13.8 and 14.4 depending on SOC. Like @macleanflood I keep it maintained with a charger. I installed a small NOCO under the hood with the plug poking out near the sway bar and it gets plugged in often. I fully expect to get at least 5 years out of it even with it's one year warranty. It is the exact same battery as their non marine version with the exact same specs and weight but with marine terminals and post terminals both and $100 less plus the additional online discount. They only give it a one year warranty because boat batteries are notorious for neglect. It is made by East Penn but from what I was told, the manufacturer can vary over time and location, but mine is definitely an East Penn.
https://www.oreillyauto.com/detail/...gm/v/a/2324/automotive-suv-2000-jeep-wrangler
It was only $148 to my door, tax included, when I ordered it online. My charging system seems to charge between 13.8 and 14.4 depending on SOC. Like @macleanflood I keep it maintained with a charger. I installed a small NOCO under the hood with the plug poking out near the sway bar and it gets plugged in often. I fully expect to get at least 5 years out of it even with it's one year warranty. It is the exact same battery as their non marine version with the exact same specs and weight but with marine terminals and post terminals both and $100 less plus the additional online discount. They only give it a one year warranty because boat batteries are notorious for neglect. It is made by East Penn but from what I was told, the manufacturer can vary over time and location, but mine is definitely an East Penn.
I guess a little better. At least for me, and all kinds of studies (consumer reports) had Texas as one of the hardest on batteries, I’m sure AZ is right there.
4 years, almost to the date, on my TJ twice, and my F150’s like 4 times, and Expedition and Explorer. 4 years tops, usually just a few months over 3.
Not sure where these guys live that get 6 and 8 years, it’s nonsense ha.
On my CJ5, I just bought a $109 Die Hard marine starting, because it was cheap. They go fast, expensive isn’t helpful.
800 CCA starting battery, no reason it should be good.
And, according to AI, whatever that is worth to you, the Marine starting battery is built for harsher conditions, thicker plates, and waves banging.
So it’s “tougher”, but that’s just what the $20 Billion AI Gemini states, not me, so not arguing it ha, for $109 vs $180, I can’t see a reasonable down side.
So it’s “tougher”, but that’s just what the $20 Billion AI Gemini states, not me, so not arguing it ha, for $109 vs $180, I can’t see a reasonable down side.
IMHO the only difference today between a standard starting battery and a marine starting battery are the terminals. Now if you are talking about a true deep cycle marine battery, that is another story.
I’m not. Lady working at Advance Auto Friday was all over me saying Deep Cycle can’t go in a car. I said it’s a starting, she said it’s a Marine that’s deep cycle….I smiled and said “ok” and took the Marine Starting battery and installed it in my CJ5 with the 304z
Not sure why it wouldn’t actually work in my TJ as well next time.
It will. Some of the box store employees are not so smart as I'm sure you already know. I've found, at least in my town, the ones at O'reilly Auto to be better than average for the most part.
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The specs on this one nearly match that of the Yellow Top Optima.... but it is certainly much cheaper. Need to keep that in mind if the optima craps out in 3 or 4 years. I'll be curious to hear how long the Super Start marine battery lasts for @B1Toad
Not for nothing, but this Marine starting battery from Diehard I posted actually has better specs and is $60 cheaper. I'm interested in seeing if both last a decent amount of time, this one isn't an AGM though.
https://shop.advanceautoparts.com/p...aign=20251010_A_TX_ET_ORDCON&utm_content=ITEM
The Gold DieHard that I just replaced was something like 7 years old... I picked it up at Sears before they closed the stores.
Oh yeah, the Sears Catalog...the original Amazon....if they had pulled their head out and innovated, ha.
ShredAZ
TJ Enthusiast
Hey Chris - I'm in AZ. I'm running a Premium AGM from O'reilly. It flat lined without any warning after my last drive. There was zero power to it this morning. It's roughly 4 years old.
That's really good though. We lived in Arizona for 4 years and our batteries only ever lasted at most 2 years. Granted those were lead acid, but as you know, the heat destroys batteries.
I just had a 6 year old Odyssey AGM fail. I am somewhat dissapointed that such an expensive battery would fail in 6 years. I am traveling in the hinterlands so I just grabbed an AGM at Walmart to replace it. I was surprised to see that Walmart only sells AGM batteries now.
Reflection of the times. Most newer vehicles require AGM batteries...last ten years or so.
My Walmart reduced the automotive isles by half and hardly carry oil and grease any more. Luckily it's all available online with free shipping so that's fine with me...I don't have to drive 30m into town...but I do need to think ahead.
-Mac
ShredAZ
TJ Enthusiast
For those that run AGM batteries, are you also using a battery tender? That's suppose to prolong the life. As I understand it, a vehicle designed for flooded batteries might not always deliver enough voltage to charge an AGM fully. They would benefit from a tender in that circumstance.
I have maintainers on everything and if it sits more than a day, or just finished a short drive, it gets plugged in. AGMs on everything now although I did the same with my FLA when I had them. The NOCO 2D doesn't exactly reach the maximum AGM voltage, or if it does not for very long, but it meets the NOCO claim that it is for all battery compositions and keeps it close enough to topped off for long life. I have those on 3 vehicles and Victron on the RV.
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