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Old 10-07-2019, 11:05 PM   #1
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AGM Batteries

I'd like to hear from people who have switch from wet cell batteries to AGM, what brands are good, what to look for, how they compare to the wet cell type.
I am going to use these in my RV, so deep cycle would be the best choice, right?
Thanks in advance!
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Old 10-07-2019, 11:22 PM   #2
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A couple months ago I replaced my two 6 volt wet batteries with 6 volt Duracell AGM batteries from Sam's club. $189 each plus $20 core charge.

I've been checking water levels every month for 14 years and have had enough of that!

The AGM batteries are a lot heavier so I bought a battery carrying strap which made it a bit easier to carry and install the batteries.

https://www.ebay.com/i/192181973550?...SABEgKC5_D_BwE

The batteries are actually manufactured in Pennsylvania.
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Old 10-08-2019, 07:21 AM   #3
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Lifeline and Full River both make excellent AGM batteries.
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Old 10-08-2019, 10:25 PM   #4
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Quote:
Originally Posted by smlranger View Post
Lifeline and Full River both make excellent AGM batteries.
I agree with Lifeline and FullRiver
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Old 10-08-2019, 10:35 PM   #5
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I bought 4 Lifeline 12 volt 8D AGM's last year. Cost was about $2,700 installed.
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Old 10-08-2019, 11:25 PM   #6
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The best thing I ever did.
Trojan 6 volt AGM for house, 2 12 volt AGM for starting. No more corrosion, no gasses, compartment stays completly clean, they accept faster charge and last longer.
Have to make sure your inverter/charger set correctly and alternator same.
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Old 10-09-2019, 12:18 PM   #7
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I went with 4 Lifeline Gp4ct 6 volt batteries, and they are great. If I had the space I would of went with the taller gp6ct.
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Old 10-09-2019, 05:41 PM   #8
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I just replaced my four 12V Flooded batteries with four 6V Trojan T105 AGMs
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Old 10-09-2019, 07:12 PM   #9
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We are dry camping as I type this on Trojan T105 AGM batteries

Best money spent on upgrades so far
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Old 10-09-2019, 07:30 PM   #10
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AGM and wet batteries typically privide similar performance and longevity. Wet batteries will typically take more abuse than AGM with less capacity or longevity loss (deep discharging, being left discharged, etc).

With AGM typically at 2x to 3x the cost.

AGM are of course maintenance free and dont mess up the battery bay.

So it mostly comes down to how adverse one is to the maintenance of wet batteries...
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Old 10-09-2019, 07:35 PM   #11
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Quote:
Originally Posted by vsheetz View Post
AGM and wet batteries typically privide similar performance and longevity. Wet batteries will typically take more abuse than AGM with less capacity or longevity loss (deep discharging, being left discharged, etc).

With AGM typically at 2x to 3x the cost.

AGM are of course maintenance free and dont mess up the battery bay.

So it mostly comes down to how adverse one is to the maintenance of wet batteries...
Lifeline AGM's are certified for military and marine use. Very tough on batteries but the Lifelines do just fine.
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Old 10-09-2019, 09:27 PM   #12
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I had AGM and went back to FLA. The cells cannot be tested when there's a problem. The AGM cost me 50% more for less life than I had out of FLA.

It takes me about 1/2 hour to top up 8-6V three times a year.
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Old 10-09-2019, 10:16 PM   #13
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Originally Posted by Mr_D View Post
Lifeline AGM's are certified for military and marine use. Very tough on batteries but the Lifelines do just fine.
What does that mean ?

Are they the only ones certified by the military ?

Certified for marine use, by who ?


Found this.

Lifeline Premium Deep Cycle AGM Technology

Manufactured entirely by hand, from start to finish and built to Military Specifications

And this,

A*United States*defense standard, often called a*military standard, "MIL-STD", "MIL-SPEC", or (informally) "MilSpecs", is used to help achieve standardization objectives by the*U.S. Department of Defense.

Doesn't say its better, just that it will fit.
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Old 10-09-2019, 10:29 PM   #14
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Quote:
Originally Posted by twinboat View Post
What does that mean ?

Are they the only ones certified by the military ?

Certified for marine use, by who ?


Found this.

Lifeline Premium Deep Cycle AGM Technology

Manufactured entirely by hand, from start to finish and built to Military Specifications

And this,

A*United States*defense standard, often called a*military standard, "MIL-STD", "MIL-SPEC", or (informally) "MilSpecs", is used to help achieve standardization objectives by the*U.S. Department of Defense.

Doesn't say its better, just that it will fit.
An old saying comes to mind:

Good enough for government work.
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