Wondering
Laughing Gas
Joined: Jun 2023
Posts: 1,155
Likes: 648
From: McKinney, TX
It's probably a service charge to change it over from a standard (lead acid) battery, to an AGM. Why they would charge you for it if you were buying a battery from them is kind of a head scratcher... well, no, not really.
4wd Low
Joined: Nov 2024
Posts: 13
Likes: 7
Just saw a video on different settings that may be draining your battery. It mentioned that the BMS(Battery Management System) has to be reset when you replace a battery. If you don’t do that the BMS doesn’t know you have replaced your battery and can limit the level of charge it gives the battery. The BMS limits the level of charging for old batteries to lengthen the battery life.
Logistics Pro
Joined: Jan 2010
Posts: 4,117
Likes: 1,645
Just saw a video on different settings that may be draining your battery. It mentioned that the BMS(Battery Management System) has to be reset when you replace a battery. If you don’t do that the BMS doesn’t know you have replaced your battery and can limit the level of charge it gives the battery. The BMS limits the level of charging for old batteries to lengthen the battery life.
Otherwise, if your truck came with a lead-acid, yes the BMS needs to be told if you change it to an AGM. Or the other way around. Though most new vehicles come with AGM.
Laughing Gas
Joined: Jun 2023
Posts: 1,155
Likes: 648
From: McKinney, TX
Ford is slowly getting there. My 2023 came with a flooded battery, my 2025 XL came with... thank Heaven... an AGM.
Fleet Mechanic
Joined: Dec 2012
Posts: 1,566
Likes: 537
From: DFW
I'm glad - my 23 came with 2 AGM batteries. That's all I'm buying now. Armada, Accord, Rogue - all AGM batteries from Interstate. That's what my truck will get, when it's time.
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Logistics Pro
Joined: Jan 2010
Posts: 4,117
Likes: 1,645
Yeah I think they switched the diesels before the gassers in the SD line, my FIL's '23 as AGM batteries in it but it's an SO 6.7. I don't recall what's in the expedition but the Bronco is an AGM.
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Laughing Gas
Joined: Jun 2023
Posts: 1,155
Likes: 648
From: McKinney, TX
Yes... I know the diesels got AGM's in 2023... they were probably using the last of their stock up on the lesser gassers. As it turned out, the factory Motorcraft battery in my 2023 almost immediately started leaking... I had to pull it and wash everything down. Then I swapped it into the 2009 F-250, which I was selling, and dropped the aftermarket battery in my 2023. Once it goes, I'll be switching to AGM, and I'll have to reset the type using ForScan.
Hotshot
Joined: Jun 2003
Posts: 12,350
Likes: 4,383
From: SW VA
That didn’t matter on my 2018. I swapped in some AGMs and never changed a thing. These ‘23+ trucks…? I replaced mine with another lead acid, so no first hand testing from me this time.
Lead Driver
Joined: Nov 2005
Posts: 5,235
Likes: 4,250
From: Kaysville Utah
My 23 HO batteries lasted 22 months. Started getting weird messages on dash. ie "Hill Descent turned off" "Cruise Control turned off" Batteries tested pretty good. O took it into an Interstate Battery shop to test. Tester said there was one very minor hitch. But he wouldn't recommend replacing batteries. Took it into Ford snf they said batteries were bad and I had them replaced ( I was 48,000 miles, so my dime) Not extra charge for any kind of programming.
Logistics Pro
Joined: Jan 2010
Posts: 4,117
Likes: 1,645
The newer trucks with BMS though, have a different charging strategy between lead-acid and AGM. IIRC you can run lead-acid on an AGM profile, and the other way around, but it's not really good for the batteries to do so.
Fleet Mechanic
Joined: Dec 2016
Posts: 1,817
Likes: 544
From: Florida
Yes... I know the diesels got AGM's in 2023... they were probably using the last of their stock up on the lesser gassers. As it turned out, the factory Motorcraft battery in my 2023 almost immediately started leaking... I had to pull it and wash everything down. Then I swapped it into the 2009 F-250, which I was selling, and dropped the aftermarket battery in my 2023. Once it goes, I'll be switching to AGM, and I'll have to reset the type using ForScan.
Hotshot
Joined: Jun 2003
Posts: 12,350
Likes: 4,383
From: SW VA
Older trucks it doesn't matter, because they don't have a BMS that is watching the battery's state of charge and adjusting the charge profile. They put out what they put out.
The newer trucks with BMS though, have a different charging strategy between lead-acid and AGM. IIRC you can run lead-acid on an AGM profile, and the other way around, but it's not really good for the batteries to do so.
The newer trucks with BMS though, have a different charging strategy between lead-acid and AGM. IIRC you can run lead-acid on an AGM profile, and the other way around, but it's not really good for the batteries to do so.
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