Best Battery

[Dagny07]

Does anyone have any recommendations for the best main battery and auxiliary battery? I am thinking about getting an Optima gel battery for the main battery, but curious if anyone has anything special for the replacement aux battery. I would do the Genesis Dual Battery off-road set up, but its not compatible with our diesel engine bays.

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[supermike]

BEST? go with lithium then.
such as,
Antigravity H6/Group-48 Car Battery
60Ah=1800CCA
40 lbs lighter than lead acid battery
$950

 

[LarryB]

The options, unless I have missed some posts, are lean on the aux battery. I suspect that may have been because the earliest JLs were still under their 3 year warranty until recently. When I asked 4WP, they said they were looking at add some later in 2021.

i have heard nothing but bad things about Optima since their acquisition. You will always have people who love/hate any product, but they seem to have lost their high level of quality control. I went with Odyssey and it seems fine.

 

[supermike]

Odyssey is very good, maybe the best, but be very careful where you buy it. Odyssey will not honer warranty if you buy it from Amazon or other "non-authorised " resellers. Plus batteries are non-returnable items, and has lots of shipping damages because they are super heavy.

I'm currently running Optima yellow top DH6. Not because it's the best but they have it in every AutoZone, and has free 3 year replacement, and not a bad battery either..

 

[grimmjeeper]

Optima quality has been up and down over the years. Every optima I have owned has lasted a long time and I have no complaints. But I know several people who had bad luck. Thing is, if they were nothing but crap all the time now they would go out of business. So at some point after going downhill they must come back up.

When it comes to batteries, I find that most of the AGM style batteries are all generally pretty good overall. There's only a few manufacturers and several brands put their name on the few options. I just look for one that's in stock locally (shipping is not cheap) and see if I can get it on sale.

As far as the Aux battery, I'm not sure shelling out nearly $1,000 is worth it. It may be the best battery but I bet there's better bang for the buck. If there was an AGM in that size, I'd probably go with that.

 

[grimmjeeper]

From what I can find (brief search) the Aux battery is a group 400. Please correct me if I got that wrong.

Here's a name brand AGM I would consider: https://shop.advanceautoparts.com/p...bci-group-size-400-200-cca-aux14-1/12268738-P

 

[Wrangler man]

From what I can find (brief search) the Aux battery is a group 400. Please correct me if I got that wrong.

Here's a name brand AGM I would consider: https://shop.advanceautoparts.com/p...bci-group-size-400-200-cca-aux14-1/12268738-P

My friends 2018 JLUR main battery crapped out 2 weeks ago. A week later the smaller axillary battery crapped out leaving him stuck and stranded no way to jump the small battery?? If there is please share a post. I will definitely replace the small battery at the same time I replace the large battery to avoid a similar situation. Am I wrong but is that small battery just for the auto start-stop feature? If so can you prolong the life by always deactivating the auto start-stop or does it make any difference? I hope they come up with small battery delete system soon so we could spend our money on one good large quality battery or possibly a true dual battery system that would fit in the engine bay or worst case scenario put the second battery battery in the back and use it as part of your Overland solar power system. Dead battery scenarios always suck but now we have two batteries to always worry about

 

[Dagny07]

My friends 2018 JLUR main battery crapped out 2 weeks ago. A week later the smaller axillary battery crapped out leaving him stuck and stranded no way to jump the small battery?? If there is please share a post. I will definitely replace the small battery at the same time I replace the large battery to avoid a similar situation. Am I wrong but is that small battery just for the auto start-stop feature? If so can you prolong the life by always deactivating the auto start-stop or does it make any difference? I hope they come up with small battery delete system soon so we could spend our money on one good large quality battery or possibly a true dual battery system that would fit in the engine bay or worst case scenario put the second battery battery in the back and use it as part of your Overland solar power system. Dead battery scenarios always suck but now we have two batteries to always worry about

You can jump start the aux battery with the main battery. Nena Barlow did a short video on it. It usually starts it long enough for you to get off the road and to somewhere safe before the entire computer stops your ability to shift (which is common).



My aux battery crapped out in the middle of a multi day competition, to the point of no return.

 

[Wrangler man]

Good to know, thank you

 

[Rhinebeck01]

Good to know, thank you

@Wrangler man
@Dagny

Do yourself a real big favor and forget you ever saw that video... I encourage others to
forget they saw that video and what it showed ....

Some of the chiitt that you see in these internet videos can get you into some real issues/ cause damage...

DO, research more about the JL's dual battery system before fooling with it lets say..

.

 

[bigfoot21075]

My friends 2018 JLUR main battery crapped out 2 weeks ago. A week later the smaller axillary battery crapped out leaving him stuck and stranded no way to jump the small battery?? If there is please share a post. I will definitely replace the small battery at the same time I replace the large battery to avoid a similar situation. Am I wrong but is that small battery just for the auto start-stop feature? If so can you prolong the life by always deactivating the auto start-stop or does it make any difference? I hope they come up with small battery delete system soon so we could spend our money on one good large quality battery or possibly a true dual battery system that would fit in the engine bay or worst case scenario put the second battery battery in the back and use it as part of your Overland solar power system. Dead battery scenarios always suck but now we have two batteries to always worry about

Check this out;

https://www.genesisoffroad.com/jl-dual-battery-kit

 

[Wrangler man]

Check this out;

https://www.genesisoffroad.com/jl-dual-battery-kit

• Fits 2018-2021 Jeep Wrangler JL with the 3.6L AND the 2.0L engines. Does NOT fit with the diesel engine

 

[Dagny07]

Check this out;

https://www.genesisoffroad.com/jl-dual-battery-kit

I'd use that kit but it won't fit in the diesel engine bay. From what I have been told.

 

[Dagny07]

@Wrangler man
@Dagny

Do yourself a real big favor and forget you ever saw that video... I encourage others to
forget they saw that video and what it showed ....

Some of the chiitt that you see in these internet videos can get you into some real issues/ cause damage...

DO, research more about the JL's dual battery system before fooling with it lets say..

.

Interesting. I didn't realize it would cause damage to jump it.

 

[FinnCustomKnives]

If you are speaking of the factory mini onboard aux battery, I cant help you out. However if you are speaking of a more traditional use case aux battery, it is really hard to beat Lithium/LiFePO4. Actually you can't, currently. While an AGM or LA may quote the same AH, they 100% do not have the same usable energy as the equivalent sized lithium. Yes, lithium's are substantially more expensive. However they have much more usable energy(per given AH rating), can charge and discharge quicker, are substantially lighter, and have quite a bit longer lifespan. So, for me at least, its a buy once cry once scenario. I'd rather spend 1k on a single, much lighter, battery that performs equivalent to 2 250 dollar, much heavier, batteries that last about half as long.

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