I replaced the OEM AGM battery with an Interstate lead acid battery and have not had any issues. The AGM batteries are being used in vehicles with start/stop technology, which my SE does not have.

 

I replaced the OEM AGM battery with an Interstate lead acid battery and have not had any issues. The AGM batteries are being used in vehicles with start/stop technology, which my SE does not have.

Oh nice! Which year is your sonata?
Would that mess up to command remote starter in anyway?


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No matter what type you use the battery should be trickle charged (maintained) if the vehicle sits unused for long periods. Trickle chargers should also be AGM compatible. It doesn't hurt to check the acid solution level in a wet battery periodically and top up with distilled water.

Some info HERE

 

2018 Sonata here.

 

2015 Sonata 2.4 GL
It has been quite cold up north. My car does not start anymore if I don’t plug in the block heater cord.
Car has a AGM battery at the moment, wondering if anyone here replaced their sonata battery with lead acid battery instead of AGM battery?
Lead acid is half the price of AGM. ( size 94R)

Thanks [emoji4]



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My 2018 Sonata SE with key start has an AGM battery, my dealer told me if it goes bad I have to replace it with an AGM or it voids the warranty!

 

BS on the dealers part. They are upselling you.
Any battery with the same cca will do.

 

Those rascals will say anything to make a sale 😂😂

 

AGM vs flooded lead acid batteries require different charging and floating voltages for optimum lifespan.
That being said, flooded are more forgiving than AGM.
So substituting AGM in place of flooded is more likely to cause disappointment than vice versa.

AGM vs Lead Acid Batteries: 12 Differences + 9 FAQs

Discover how AGM vs lead acid batteries differ, including some battery FAQs.

www.repairsmith.com

BU-201a: Absorbent Glass Mat (AGM)

Learn what differentiates Absorbent Glass Mat (AGM) batteries from other lead acid battery types

batteryuniversity.com

BU-403: Charging Lead Acid

BU meta description needed...

batteryuniversity.com

 

Reading the "The 12 Differences..." link you shared, it seems that AGM battery has more advantages than Lead Acid battery or did I read that wrong? Plus, at the end it says, "If your original battery is an AGM battery, you can’t change it to an FLA battery ".

 

Thanks everyone for your inputs. Decided to go with the 800CCA/960CA AGM battery, found a deal $199 CAD at a local battery store with a 3 yr replacement warranty


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... with a 3 yr replacement warranty


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Is that a 3-year full replacement warranty or a 3-year pro-rated replacement warranty?

 

Local battery store?....... like the ones I see that advertise AA/AAA battery sales in the front window?
I've never set foot in one of those places. If that's where you purchased it,

Perhaps I will take a peek inside it, being my Hyundai is a 2019 and will be due a new battery in November 2022 (four years old then). That's been my battery-replacement time-line/ritual for a few decades now.

 

Local battery store means this place which sell automotive filters and automotive batteries not AA /AAA.
4 years seems little short time for swapping batteries.
Also my last battery was original factory, lasted 7.5 years in Canadian prairie brutal cold.
Hope the new one has some decent life on it.


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I used the Costco H7 Lead acid. 4 year full replacement warranty too.