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Just replaced Flooded battery with AGM, was that a mistake? #5283291 12/02/19 06:56 PM
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jayjr1105 Offline OP
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My 2013 stock battery was starting to struggle on cold mornings after the car mostly sits on the weekends. Got it measured around 240CCA and decided that it was time for a new one. Got a JC made Champion AGM at PepBoys for $90 after I get the $50 rebate.

Car is already noticeably starting better. I'm reading conflicting evidence online about whether an AGM is a drop in replacement for the Flooded. Someone ease my mind because I could have bought a flooded Interstate at Costco for $80 with no rebate nonsense.


2013 Mazda 3 - Supertech FS 0w20
2005 Honda Odyssey - Supertech FS HM 5w20
Re: Just replaced Flooded battery with AGM, was that a mistake? [Re: jayjr1105] #5283299 12/02/19 07:00 PM
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atikovi Offline
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Long as it's 12 volts there shouldn't be a problem.

Re: Just replaced Flooded battery with AGM, was that a mistake? [Re: jayjr1105] #5283300 12/02/19 07:01 PM
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dbias Offline
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AGM are good long lasting batteries. I just replaced the original battery in my 2011 Jetta this past spring at 150k miles

Last edited by dbias; 12/02/19 07:03 PM.

2011 VW JETTA Castrol Edge 0W-40
2012 FORD TRANSIT CONNECT Castrol Edge 5W-30
2016 HONDA CIVIC COUPE Casrol Edge 5w-30
2017 AUDI A4 Ravenol 5W-40 RUP
Re: Just replaced Flooded battery with AGM, was that a mistake? [Re: jayjr1105] #5283308 12/02/19 07:07 PM
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Propflux01 Offline
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You did fine. Sleep well.


2014 Hyundai Elantra
2014 Hyundai Elantra GT

A 55 Gallon Drum And A Shovel Can Solve A lot of Life's Little "Problems"
Re: Just replaced Flooded battery with AGM, was that a mistake? [Re: jayjr1105] #5283311 12/02/19 07:10 PM
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Dave9 Offline
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Any remotely modern vehicle has a charging system tightly enough regulated that it can safely charge AGM designed for vehicle use such as that one is. Really old vehicles that may get up closer to 15V charge voltage should not use an AGM unless you put a regulation/drop circuit between them.

Re: Just replaced Flooded battery with AGM, was that a mistake? [Re: jayjr1105] #5283317 12/02/19 07:22 PM
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2016 KIA Forte SX 1.6L T-GDI Daughter
2013 Chevy Impala LT 3.6L GDI Mine
2014 Chrysler 200S 3.6L PFI Wife
Re: Just replaced Flooded battery with AGM, was that a mistake? [Re: jayjr1105] #5283354 12/02/19 07:50 PM
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PowerSurge Offline
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AGM’s are better for cold climates. Wet cells are better for hot climates.

Re: Just replaced Flooded battery with AGM, was that a mistake? [Re: wymi516] #5283453 12/02/19 09:37 PM
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CharlieBauer Offline
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Whole test was flawed by not topping them up correctly at the beginning.


It ain't what you don't know that gets you into trouble. It's what you know for sure that ain't so.

- mistakenly attributed to Mark Twain
Re: Just replaced Flooded battery with AGM, was that a mistake? [Re: PowerSurge] #5283460 12/02/19 09:42 PM
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CharlieBauer Offline
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Originally Posted by PowerSurge
AGM’s are better for cold climates. Wet cells are better for hot climates.


AGMs are better in cold and hot climates.


It ain't what you don't know that gets you into trouble. It's what you know for sure that ain't so.

- mistakenly attributed to Mark Twain
Re: Just replaced Flooded battery with AGM, was that a mistake? [Re: jayjr1105] #5283477 12/02/19 10:12 PM
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TXCarGeek Offline
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I've used AGMs in two vehicles not explicitly designed for AGM use and I didn't see much if any benefit. I have a 2008 BMW that allows me to change the charging profile to accommodate the needs of an AGM...I took advantage of Pepboy's black friday sale and bought an AGM and I expect this battery to do better than my two other vehicles that did not allow me change the charging profile did with AGMs.

Re: Just replaced Flooded battery with AGM, was that a mistake? [Re: jayjr1105] #5283479 12/02/19 10:15 PM
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TXCarGeek Offline
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So bottomline: your car will be fine but it's unlikely you'll see double the life out of the battery or anything like that. I didn't when I used AGM batteries in my vehicles that originally came with FLAs.

Re: Just replaced Flooded battery with AGM, was that a mistake? [Re: CharlieBauer] #5283480 12/02/19 10:15 PM
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Originally Posted by CharlieBauer


Whole test was flawed by not topping them up correctly at the beginning.



yup

agm typically require 14.7 vs 14.4 volts and his charger did not differentiate - therefore the AGMs never got fully charged.

UD


Uncle Dave
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Re: Just replaced Flooded battery with AGM, was that a mistake? [Re: jayjr1105] #5283487 12/02/19 10:23 PM
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I picked up a Pro-Logix 2310 which has different logic for AGM and FLA, plus does 6V, 12V, and power supply modes. This has charge rates of 2-6-10A... they also make the 2320 which has 2-10-20A. You can now find the 20A version for the same price I paid for the 10A. Since it’s a “smart” charger, you can also use it as a maintainer and leave it connected long-term if you have a stored battery without worrying about frying the plates.

Re: Just replaced Flooded battery with AGM, was that a mistake? [Re: CharlieBauer] #5283643 12/03/19 06:06 AM
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PowerSurge Offline
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Originally Posted by CharlieBauer
Originally Posted by PowerSurge
AGM’s are better for cold climates. Wet cells are better for hot climates.


AGMs are better in cold and hot climates.


Negative ghost rider.

Last edited by PowerSurge; 12/03/19 06:34 AM.
Re: Just replaced Flooded battery with AGM, was that a mistake? [Re: jayjr1105] #5283654 12/03/19 06:40 AM
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PowerSurge Offline
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https://www.consumerreports.org/car...ts-your-car-battery-what-to-do-about-it/

“But even AGM batteries face challenges. “AGM batteries will perform well in the heat, but the life span will be hampered due to loss of water from the high temperatures,”

FLA’s last longer in hot climates.

Last edited by PowerSurge; 12/03/19 06:41 AM.
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