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Old 03-20-2016, 09:58 AM
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Default AGM switching to Lead Acid

Well, I'm considering switching from AGM to lead acid.

My battery bank is in the bed of my truck, so I'm not concerned about the gas that's created when the batteries charge.

I have money in the bank and can trade in my year old AGM's for partial credit on the new purchase. I'd like to get a bunch of "scrubber batteries" that look like these 8d's





I can get a lot more capacity for my money with non-sealed batteries. Plus, my amps can take up to a 16v input voltage. I have an isolated electrical system from stock. It's my understanding that I can charge the lead acid batteries higher with a potentiometer on occasion (like 15.5-16v for full tilt demos) because I can just add more distilled water if they gas a little, unlike AGM's which would be permanently damaged by gassing.

I have five AGM group 49's right now that are 80ah each. I could buy more for $150 each if that would be a better option, but I'd like to try a huge bank of deep-cycle scrubbers designed to run heavy equipment all day off one charge. Even with the quad alts, I'll probably hit battery voltage full tilt at idle. The amps are stable down to 8.5v, so battery voltage would be fine.

Thoughts?
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Old 03-20-2016, 11:38 AM
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AGM's usually recharge faster and have more to give than standard batteries of the same size.
but the best/only reason I can think of to switch to standard batteries is warranty.
most AGMs have no warranty.
most standard batteries have warranty.

---------------------------------------------
the reason I refuse to call a standard battery "lead acid" is because AGM is lead acid also.. but the acid is Absorbed in the Glass Mat.
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Old 03-20-2016, 11:57 AM
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IMO I would add to the AGM's you have? Upkeep and maintenance on a bank of flooded batterys is a PITA and when one or two boil over and the mess that makes and the damage it does if not taken care of immediately. In my experience in marine and industrial applications AGM's will last twice as long as a flooded battery.
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Old 03-20-2016, 12:46 PM
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i wouldnt swap.
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Old 03-20-2016, 03:34 PM
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Don't do it. AGM is superior in every way. Higher charging voltage is not an advantage
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Old 03-20-2016, 04:03 PM
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Keep Your AGM'S !
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Old 03-20-2016, 05:15 PM
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Agm or nothing.
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Old 03-20-2016, 07:29 PM
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You really sound like you just need some lithium batteries or even caps before you go to lead acid
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Old 03-20-2016, 07:56 PM
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Caps all day with the agms.
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Old 03-20-2016, 09:26 PM
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Quote:
Originally Posted by iamsonic View Post
AGM's usually recharge faster and have more to give than standard batteries of the same size.
but the best/only reason I can think of to switch to standard batteries is warranty.
most AGMs have no warranty.
most standard batteries have warranty.

---------------------------------------------
the reason I refuse to call a standard battery "lead acid" is because AGM is lead acid also.. but the acid is Absorbed in the Glass Mat.
My Exide AGM's have a warranty.

They're group 49's. They're really long, but not very tall. They're also not the cheapest group size I can buy, but I don't want to mix different group sizes because the look would bother me!!

That's one of the reasons I thought about trading them all in and going with one type of battery

Quote:
Originally Posted by B-Shot View Post
IMO I would add to the AGM's you have? Upkeep and maintenance on a bank of flooded batterys is a PITA and when one or two boil over and the mess that makes and the damage it does if not taken care of immediately. In my experience in marine and industrial applications AGM's will last twice as long as a flooded battery.
I didn't think standard batteries were hard to keep up. I've never had to do any maintenance to any I've had under the hood

Quote:
Originally Posted by Jeffhulbert50 View Post
i wouldnt swap.
Thanks for your input. What reasoning though?

Quote:
Originally Posted by chevygirl87 View Post
You really sound like you just need some lithium batteries or even caps before you go to lead acid
Lithium is not what I need. I'm not limited by weight or space. Lithium is ideal when you don't have a ton of space and want to save weight.

I have tons of space, a truck, and I don't have to worry about bi-product gas

Quote:
Originally Posted by Chris McNeeley View Post
Caps all day with the agms.
Caps are expensive, and what I need is reserve for when my alternators can't keep up at idle
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