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FYI Costco changed their battery warranty at some point. It’s now pro-rated and not a full replacement warranty. I don’t know what percentage of batteries fail to even go 3-4 years, but doesn’t feel good to think that if it fails right before the last month that you only get a fractionally small discount and are essentially forced to buy a new battery.
So in the cold this morning the truck was a smidge lethargic to start (not crazy, but it was a sign), so while I was out i picked up an H7 AGM from Walmart since it was exactly the same price as the H6 AGM. Funny though that the CCA listed on the website and the actual battery differ. Not sure if anything changed, but I was slightly disappointed. Still nearly 200CCA more than the OEM H6. I'll probably throw it in tomorrow.
I ended up buying the Everstart H6 Platinum recommended in one of the posts above. The CCA on the battery matched what was advertised. But the price did not...I was told the price I saw was the "on-line" price, in-store price was $10 higher!
But it fit perfectly and so far has worked out very well. I let the truck sit for 24 hours to reset the Battery Management System versus the recommended 8 hours (I just didn't need to use the truck).
I ended up buying the Everstart H6 Platinum recommended in one of the posts above. The CCA on the battery matched what was advertised. But the price did not...I was told the price I saw was the "on-line" price, in-store price was $10 higher!
But it fit perfectly and so far has worked out very well. I let the truck sit for 24 hours to reset the Battery Management System versus the recommended 8 hours (I just didn't need to use the truck).
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You did not really re-set the BMS system to handle the battery as NEW, in age.
It will treat it as the old one was treated for age.
There is a specific procedure to do this.
The time you allowed only calibrates the BMS system for the voltage level detected from the new Battery, but not for it's new age.
It's two different parameters.
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You did not really re-set the BMS system to handle the battery as NEW, in age.
It will treat it as the old one was treated for age.
There is a specific procedure to do this.
The time you allowed only calibrates the BMS system for the voltage level detected from the new Battery, but not for it's new age.
It's two different parameters.
Good luck.
My owner's manual tells me 8 hours rest is all that's needed when changing batteries. That's good enough for me.
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You did not really re-set the BMS system to handle the battery as NEW, in age.
It will treat it as the old one was treated for age.
There is a specific procedure to do this.
The time you allowed only calibrates the BMS system for the voltage level detected from the new Battery, but not for it's new age.
It's two different parameters.
You don't have to manually reset the BMS. It will reset itself. One of the engineers posted here some time ago (wish I could find his post) and said he doesn't bother resetting the BMS; the system is designed to detect and adjust to a new battery, as one would expect.
FYI Costco changed their battery warranty at some point. It’s now pro-rated and not a full replacement warranty. I don’t know what percentage of batteries fail to even go 3-4 years, but doesn’t feel good to think that if it fails right before the last month that you only get a fractionally small discount and are essentially forced to buy a new battery.
That sucks... I've been getting free batteries for cars and boats for years. Costco would never test the battery, just take it and replace it....
BMS has to be reset to start a new battery life counter. Letting it sit 8 hours teaches the system the new state of charge but BMS will still charge it as a 7 year old battery.
So here is the jist. The Manual procedure does work. I was told by my calibrator a couple years ago that for US vehicles it was disabled. However, last year was able to finally get into our work garage and do some testing. The manual procedure is enabled on newer F150's. Talked with our new lead calibrator and received some better insight on what the reason was for not providing this information beforehand. The issue in having a manual BMS reset procedure is it allows both the assembly plant and selling dealer to immediately reset the BMS SOC and deliver as good when essence, the battery could be good, partially bad/weak, or on its last leg. Ford has requirements on battery quality/SOC before being shipped from the plant and as a selling dealer. A BMS reset bypasses that and can create a disgruntled consumer.
So with that being said, I have pushed to get the manual procedure added to the owner manuals for vehicles the manual procedure is enabled (which is nearly all Ford vehicles except a few). Ensure the battery light flashes after doing the procedure. I could not provide this detail earlier as it was not public information. There is much more to the BMS operation, differences between MY's and vehicle lines that I can provide. I have stopped sharing information because it can lead to false presumptions.
Another item that I have tested was the BMS able to learn on its own a new battery has been installed. There are algorithms in the BMS for the more likely case that a consumer replaces their own battery and not perform a reset. It is not an exact timeframe, but around the 3 week mark after replacing with a new battery, the BMS will know a new battery has been installed and will reset. Note, testing was only conducted with as built batteries. Replacing with another type of battery may delay or incorrectly set a different of the actual battery.
The one advantage of performing a reset are for vehicles that have the "Vehicle Shutting Down to preserve Battery" message. If the BMS reset is not immediately performed with a new battery, the BMS will continue to protect thinking the old battery is installed.
I want to end by saying, Ford requires the dealer to perform a BMS reset as we pay for the replacement cost and warranty that work. We don't require a consumer, auto parts store or anybody else to perform the reset. In the big scheme of things, performing a BMS reset is minuscule to how the battery was manufactured, lot rot, vehicle drive conditions, vehicle issues, added equipment and maintenance. I replaced my OEM battery with a non-OEM, same size H6 AGM from Napa. I chose that battery due to the mfger. I did not perform a BMS reset. It is simply not that important.
10-21-2023, 08:36 AM
