Aux battery is still charging

[ShadowsPapa]

So I replaced my own aux battery with one from Napa and also replaced my main battery with an Oddesy about a year ago and havent had an issue since. My JT is no longer my daily driver and it recently sat parked for 10 days. The ESS worked at the first stoplight about 2 miles from my house yesterday morning when I drove it. The temps over the last few weeks here have been in the high 20s/low 30s at night and 40s or maybe 50 during the day. That said I let it warm up for a few minutes on the driveway before heading out but you get the idea.

I don’t think it’s that the system doesn’t work, but rather, it‘s poor sourcing of batteries by FCA/Stellantis.

Your case absolutely supports the "bad batteries" bit my dealer said and makes sense.

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[dcmdon]

So I replaced my own aux battery with one from Napa and also replaced my main battery with an Oddesy about a year ago and havent had an issue since. My JT is no longer my daily driver and it recently sat parked for 10 days. The ESS worked at the first stoplight about 2 miles from my house yesterday morning when I drove it. The temps over the last few weeks here have been in the high 20s/low 30s at night and 40s or maybe 50 during the day. That said I let it warm up for a few minutes on the driveway before heading out but you get the idea.

I don’t think it’s that the system doesn’t work, but rather, it‘s poor sourcing of batteries by FCA/Stellantis.

You may want to consider a battery tender. I have 2 cars that are not daily drivers and battery tenders have worked very well so far. One battery is 4 years old and the other is 8 years old. So far so good.

I'm a big fan of Battery Tender brand products. Their normal product has a 10 year warranty.

The car with the 4 year old battery was going strong on a Yaesu trickle charger. It worked great until it failed and drew the battery down killing it beyond repair. I replaced the battery and bought another battery tender.

https://smile.amazon.com/dp/B00068XCQU

 

[ShadowsPapa]

You may want to consider a battery tender. I have 2 cars that are not daily drivers and battery tenders have worked very well so far. One battery is 4 years old and the other is 8 years old. So far so good.

I'm a big fan of Battery Tender brand products. Their normal product has a 10 year warranty.

The car with the 4 year old battery was going strong on a Yaesu trickle charger. It worked great until it failed and drew the battery down killing it beyond repair. I replaced the battery and bought another battery tender.

https://smile.amazon.com/dp/B00068XCQU

And what do ya think is on my SX4 right now since it's parked for the season ;-)
And I'm about to buy another for my 73 Javelin.
Batteries typically last me waaay past their warranty periods. I had a 3 year walmart battery in my 36 F20 and that battery sat for months out of the year, was charged by a generator on that low rpm engine and the battery lasted 7 years.

 

[jmdwifi]

My bike is on a tender and it has served me well. My jeep is driven everyday.

 

[slim chance]

dealer did a load test on both batteries ... aux failed, main was very good ... no aux in stock ... 2 wks later, yesterday, got new stock of aux batteries and installed it for me ... ESS still did not work, no messages on start up .. after driving 50 miles the ESS starting working just like it should ... hope this is the end of this problem ... 1,650 miles on Oscer

 

[legacy_etu]

Interesting tidbit. I think most people know this but......new batteries should be charged before installation into a vehicle. I have yet to buy a battery that didn't need a good charge when bought new. In fact, the last battery I bought for my Mother took over 26 hours on my Battery Tender to get it to a full charge. I wonder if the stuff getting shipped to dealers sits around as well. One wouldn't think so but...........

Also a ardent supporter of the Battery Tender brand!

 

[DobaMark]

https://www.wikihow.com/Organize-a-Class-Action-Lawsuit?amp=1

Class action lawsuits make lots of money for the lawyers and the members of the class get very little.

 

[slim chance]

i am also an " ardent supporter of the Battery Tender brand " ... used them for ATV and bikes ... thought the dealer would have charged the aux battery BEFORE installation ... guess not .... how do you charge just the aux battery without installing the Battery Tender kit??

 

[jmdwifi]

i am also an " ardent supporter of the Battery Tender brand " ... used them for ATV and bikes ... thought the dealer would have charged the aux battery BEFORE installation ... guess not .... how do you charge just the aux battery without installing the Battery Tender kit??

I drive my jeep everyday. I didn't think a tender would be needed. Ive never had a tender on cars or trucks and I have always only owned one car or truck. I have one on my bike but it sits during the winter and sometimes a couple of weeks during riding season. It is needed on that because it's got electronics that leach power when it's off.

 

[ShadowsPapa]

Sitting in modern vehicles there's a drain on batteries. Even if it starts, after days or weeks, the battery is down a fair amount. That constant down, up, down, up - is hard on batteries.
Best to use a charger made for AGM batteries, or at least the low setting of a standard charger. A "trickle" is better because charging the AGM fast is worse on them than flooded cell batteries like the conventional lead/acid battery.
A smart charger is best - one that detects the charge and slows down, even shuts off, when the battery reaches full charge.
This is one reason I like the tender types - they work slow (takes a lot of hours to fully charge) and they pulse more than blast a charge in.
Doing it right, AGM batteries can take time to charge.
That's probably why if my truck sits a few days the thing says it's charging the battery for an hour or more.

 

[taintedsaint]

I've yet to have an issue with ESS or batteries (knock on wood) but plenty of friends have. I believe halfway through 2022 MY or 2023, Jeep will end this two battery system.

 

[ShadowsPapa]

I've yet to have an issue with ESS or batteries (knock on wood) but plenty of friends have. I believe halfway through 2022 MY or 2023, Jeep will end this two battery system.

It's not the fault of the 2 battery system, it's how it's implemented and the fault of the batteries being used.
There are actually worse systems out there according to one auto blog article I read which rated them. Yeah, Jeep was bad but there are worse.
They've used this same system for years on Jeep vehicles.

 

[taintedsaint]

It's not the fault of the 2 battery system, it's how it's implemented and the fault of the batteries being used.
There are actually worse systems out there according to one auto blog article I read which rated them. Yeah, Jeep was bad but there are worse.
They've used this same system for years on Jeep vehicles.

I hope its reliability holds. This is my first new Jeep since '97 and I'd hate to sour on it. The amount of electronics already makes me nervous.

 

[dcmdon]

I drive my jeep everyday. I didn't think a tender would be needed. Ive never had a tender on cars or trucks and I have always only owned one car or truck. I have one on my bike but it sits during the winter and sometimes a couple of weeks during riding season. It is needed on that because it's got electronics that leach power when it's off.

You don't need a tender. My response about the tender was to a more recent post where the person said their Gladiator wasn't their daily driver and could go a couple of weeks between drives.

To the person who advocated charging a battery before installing it. While this is a fine thing to do, its not really necessary and doesn't make any difference. Within a few hours of being installed in a vehicle the battery will find its level with whatever voltage the charging system is charging it to.

If you start with a 75% charged battery the alternator will simply charge it to X volts.
If you start with a 100% charged battery the alternator will simply charge it to the exact same X volts. It will just take a bit longe.r.

 

[jmdwifi]

You don't need a tender. My response about the tender was to a more recent post where the person said their Gladiator wasn't their daily driver and could go a couple of weeks between drives.

To the person who advocated charging a battery before installing it. While this is a fine thing to do, its not really necessary and doesn't make any difference. Within a few hours of being installed in a vehicle the battery will find its level with whatever voltage the charging system is charging it to.

If you start with a 75% charged battery the alternator will simply charge it to X volts.
If you start with a 100% charged battery the alternator will simply charge it to the exact same X volts. It will just take a bit longe.r.

Yes, that makes sense if it sits for sure.

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