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#4624598 - 01/05/18 08:02 AM Why not go with an AGM Battery?
ZZman Offline


Registered: 03/17/08
Posts: 5794
Loc: Michigan
I had to look up what a AGM battery was. From what I read it is far superior to a normal vehicle battery.

Your thoughts?
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#4624600 - 01/05/18 08:06 AM Re: Why not go with an AGM Battery? [Re: ZZman]
Chris142 Online   content


Registered: 06/05/03
Posts: 16843
Loc: Deplorable in apple valley, ca
I like them. They dont corrode the terminals like a flooded battery does.
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#4624607 - 01/05/18 08:12 AM Re: Why not go with an AGM Battery? [Re: ZZman]
rooflessVW Online   content


Registered: 12/24/11
Posts: 4095
Loc: North Carolina
East Penn AGM (NAPA's "The Legend) is what I always buy.

Factory Varta AGM in the Phaeton is at 13 years and still going strong.
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#4624612 - 01/05/18 08:15 AM Re: Why not go with an AGM Battery? [Re: Chris142]
Kira Offline


Registered: 08/19/10
Posts: 5263
Loc: Champlain/Hudson Valley
Somewhere, somehow the AGM's differ in the way they recharge optimally.

I've read that a vehicle's charging system needs to tailored to them. The same goes for battery chargers.

I don't know if it's a huge difference or not.

I have nothing AGAINST AGM batteries.

I do believe the industry wants to say good-bye to old technology. If FLA batteries make up 99% of the business, it'll take time.

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#4624618 - 01/05/18 08:18 AM Re: Why not go with an AGM Battery? [Re: ZZman]
JohnnyJohnson Offline


Registered: 10/22/09
Posts: 2774
Loc: Wet side WA
Wrong thread.


Edited by JohnnyJohnson (01/05/18 08:21 AM)
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#4624620 - 01/05/18 08:22 AM Re: Why not go with an AGM Battery? [Re: ZZman]
Quattro Pete Offline


Registered: 10/30/02
Posts: 35897
Loc: Great Lakes
Originally Posted By: ZZman
Why not go with an AGM Battery?

One reason is cost.
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#4624624 - 01/05/18 08:24 AM Re: Why not go with an AGM Battery? [Re: ZZman]
HoosierJeeper Offline


Registered: 11/23/16
Posts: 1276
Loc: WI
I got an East Penn AGM battery for my Liberty for the same as a Diehard Gold...Blain's Farm and Fleet usually has them on sale. Not sure if you have them in Michigan.
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#4624625 - 01/05/18 08:24 AM Re: Why not go with an AGM Battery? [Re: Quattro Pete]
JohnnyJohnson Offline


Registered: 10/22/09
Posts: 2774
Loc: Wet side WA
Originally Posted By: Quattro Pete
Originally Posted By: ZZman
Why not go with an AGM Battery?

One reason is cost.


Yes sometimes we get so proud of our new technology we hurt the bottom line.
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#4624638 - 01/05/18 08:41 AM Re: Why not go with an AGM Battery? [Re: ZZman]
Rand Offline


Registered: 08/20/03
Posts: 12653
Loc: NE,Ohio
Several reasons
1) cost
2)needs different charging.
3)availability


Cost- for the 2013 outback the Penn-Deka FLA battery was 83$ with 3 year full replacement warranty.
The cheapest agm I found with at least a 3 year warranty in group 25 was around $190

Something like https://www.pepboys.com/product/details/844466/00566
I am sure it is superior but is it over 2x as superior? Esp. for my climate and use?

2) Agm batteries want slightly higher voltage. If your car is designed for AGM its better.
(see google for more on this not writing a book here)

3) group 25 doesnt have many agm batteries available.
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#4624639 - 01/05/18 08:41 AM Re: Why not go with an AGM Battery? [Re: ZZman]
dparm Offline


Registered: 04/19/10
Posts: 13466
Loc: Chicago, IL
Originally Posted By: ZZman
I had to look up what a AGM battery was. From what I read it is far superior to a normal vehicle battery.

Your thoughts?



Cost is the biggest thing, but if the battery lasts longer and can tolerate more severe use, then I'd say it's paying for itself.
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#4624669 - 01/05/18 09:07 AM Re: Why not go with an AGM Battery? [Re: Chris142]
john_pifer Offline


Registered: 07/08/12
Posts: 1972
Loc: Nashville, TN via Memphis
Originally Posted By: Chris142
I like them. They dont corrode the terminals like a flooded battery does.


Easily prevented by applying grease to protect the cable terminals.
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#4624686 - 01/05/18 09:22 AM Re: Why not go with an AGM Battery? [Re: ZZman]
Eddie Online   sleepy


Registered: 12/07/03
Posts: 9579
Loc: Florida, Cape Coral
Wonder why the warranty is only as good as a cheaper flooded battery?
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#4624688 - 01/05/18 09:25 AM Re: Why not go with an AGM Battery? [Re: ZZman]
john_pifer Offline


Registered: 07/08/12
Posts: 1972
Loc: Nashville, TN via Memphis
Lots of information available on Wiki and through other sources. There are some disadvantages to AGM & gel batts. They're not superior in every way.
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07 Yamaha YZ-250, Klotz, Rotella


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#4624691 - 01/05/18 09:27 AM Re: Why not go with an AGM Battery? [Re: Eddie]
john_pifer Offline


Registered: 07/08/12
Posts: 1972
Loc: Nashville, TN via Memphis
Originally Posted By: Eddie
Wonder why the warranty is only as good as a cheaper flooded battery?


Wikipedia says a conventional flooded-cell batt. will actually last longer WITH PROPER MAINTENANCE. That's probably the reason it seems like the AGMs last longer - most people don't maintain water levels in the regular batteries.
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#4624702 - 01/05/18 09:38 AM Re: Why not go with an AGM Battery? [Re: ZZman]
Andy636 Offline


Registered: 12/30/10
Posts: 778
Loc: Romania
I don't know who makes the batteries for Bosch, but whenever a OEM battery kicks the bucket, Bosch S5 is all I'll swap it for.

All other brands like Yuasa and Varta are toast after 3-4 years...

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