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Old 12-06-2021, 01:44 AM   #1
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Best AGM Battery?

We are having issues with lead acid group 31 supporting our needs.
Read lots of info here on AGM batteries.
no sure what percentage grp 31 agm increases vs. lead acid grp 31?
not much on google.
Did find this if we do AGM?
https://www.bestreviews.guide/deep-cycle-rv-batteries

Some have said they have found 125 AH? most of these are 100AH.
Looks like nothing needs to change.
no solar, bim, inverter etc changes?
Just trying to learn of agm worth it.
I know current batteries do not support our MH needs.

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Old 12-06-2021, 01:45 AM   #2
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good question. We are both deep diving this
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Old 12-06-2021, 01:46 AM   #3
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Good question we ate both learning from these fine folks
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Old 12-06-2021, 01:54 AM   #4
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Lifeline XT 125 AH at $450 each
https://www.amazon.com/gp/product/B008CUFDPC/

Or 135 AH for $350 each
https://www.amazon.com/gp/product/B071K538YK

Of course at those prices you're in lithium territory.
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Old 12-06-2021, 02:14 AM   #5
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also reviewing Lithium and what changes needed to bim, charing system , solar

https://gearjunkie.com/camper-rv/diy...ithium-battery
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Old 12-06-2021, 02:16 AM   #6
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Originally Posted by 16ACE27 View Post
Lifeline XT 125 AH at $450 each
https://www.amazon.com/gp/product/B008CUFDPC/

Or 135 AH for $350 each
https://www.amazon.com/gp/product/B071K538YK

Of course at those prices you're in lithium territory.
thanks may need to look at lithium.
We may move to NM and thus avoid cold winter in Montana.
Need to research bim, solar, charging needs .

We want the best!! now and avoid these shitty FLA
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Old 12-06-2021, 02:37 AM   #7
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this person changed their converter due to lithium?



and used Battle born ?
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Old 12-06-2021, 03:25 AM   #8
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Battleborn is no longer the best.
They're just one in a field of others...those others often being HALF the price of the iconic Battleborn and a bit better equipped.

If you want the best, set aside $5,000+ for the complete system.
Otherwise
Agm batteries will last you five or so years.
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Old 12-06-2021, 08:59 AM   #9
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I have used these. They are good batteries but finding them in stock now might be a problem.

https://www.samsclub.com/p/duracell-...gm/prod3590232
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Old 12-06-2021, 01:40 PM   #10
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Originally Posted by Bob Nodine View Post
I have used these. They are good batteries but finding them in stock now might be a problem.

https://www.samsclub.com/p/duracell-...gm/prod3590232
^^^^i have had no issue with these two years now
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Old 12-06-2021, 02:51 PM   #11
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Originally Posted by Bob Nodine View Post
I have used these. They are good batteries but finding them in stock now might be a problem.

https://www.samsclub.com/p/duracell-...gm/prod3590232
That is a great price for a Duracel AGM. Amazon has a few less popular but decent brands of AGMs, WindyNation and VMax, for about $200 each. Liflelines are 2-3 times higher. I installed a couple of the WindyNation batteries in my new Axis and they are doing great.

David
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Old 12-06-2021, 03:57 PM   #12
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Quote:
Originally Posted by Bob Nodine View Post
I have used these. They are good batteries but finding them in stock now might be a problem.

https://www.samsclub.com/p/duracell-...gm/prod3590232
Thanks for the hot tip!
My FLAs have had 3 good years (Duracell 27s); but I've got room for a pair of 31s, and I do like the brand...
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Old 12-06-2021, 05:56 PM   #13
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Quote:
Originally Posted by Bob Nodine View Post
I have used these. They are good batteries but finding them in stock now might be a problem.

https://www.samsclub.com/p/duracell-...gm/prod3590232
Excellent will be in Chattanooga TN and will check
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Old 12-06-2021, 06:06 PM   #14
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Wow checked Sam's in Georgia Tennessee Alabama no group 31..will be near in SC & NC coast will check there thx
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Old 12-06-2021, 06:34 PM   #15
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They're out of stock here also.
I can wait...
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Old 12-06-2021, 08:19 PM   #16
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The search is on we are traveling soon from NC to nm AZ. The hunt is on!
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Old 12-06-2021, 11:36 PM   #17
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Northlake in illinois has them 179.00 dollars
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Old 12-07-2021, 01:06 AM   #18
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Those Duracells are what I was going to buy originally. Went to a Sam's where they had plenty in stock, put two in the cart to check out and learned that I had to pay the core charge I had not taken the other batteries out.

So I go home empty handy, but by chance on a SOB forum board I got to reading a lively discussion about Dual Purpose AGMs vs Pure AGMs. That same night I saw the vMax Tanks on Amazon. Called vMax tank to get the facts straight and then I learned I was able to order the vMax Tanks online, no shipping cost, no core and no tax. So net net out the door back then it was only about $90 difference, but I got 125ah vs 110ah, Batteries shipped to my front door and I had a chance to sell my FLA (but no one wanted them

But a big advantage to me beside the number of lifecycles is the fact that the pure AGMS do not come with the automotive posts. You should NEVER need automotive post so why are they there? Just to get in your way and easy to spark by accidental touching etc.

Quite frankly I am not sure of any battery that is for sale that is a bad, just a question of what do you need and how can you maximize? I wanted maximum ahs and got it. 125 AHs each. VMax had a Golf cart battery at 135ahs that cost more, but the Engineer at VMax told me for an RV application the SLR model at 125ahs was going to give me more overall capacity and be cheaper. I wish I could remember why, but he didn't have to say it twice since less money was involved; I order on the same call.
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Old 12-07-2021, 02:02 AM   #19
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A little pricier than the Sam's Club model; but you may have better luck with stock at BatteriesPlus $250 plus core. Replaced my house batteries with these about 18 months ago. Well pleased thus far.



https://www.batteriesplus.com/produc.../sli31dtmagmdc
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Old 12-07-2021, 02:48 AM   #20
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Fun fact I learned is that AGMs will handle occasional discharge down to something like 30% DOD without harm. Don't try that with a FLA battery. But also be careful to not overcharge AGMs which could happen with solar. A simple change to your charge controller will remedy that.

So an AGM has an effective higher energy density than FLA, can be stored in any position, but still may off gas slightly... not recommended for indoor mounting like lithium.

Remember... even though the price tag of AGMs may be "approaching" lithium, there's more to a lithium conversion than just swapping batteries. There's the cost of a different converter and BIM. Add those in and you'll see why AGMs are a logical choice. AGMs charge quicker than FLA too.
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