Talk about great timing!

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Good on you patman. When something like that happens to me. I try to help someone who might have been less lucky
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Originally Posted by StevieC
Buy a lottery ticket.
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I did, but all I won was a free ticket this time
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Originally Posted by ecotourist
Originally Posted by The Critic
Don't forget to register that battery. Otherwise the charging algorithm will not be correct.

I assume you're talking about an AGM battery. What do you have to do?


It's not an AGM battery, it's the Everstart Maxx (same one I have in my Civic which is serving me well and I've used previous versions of this same battery in many cars over the past 25-30 years with great success)
 
Originally Posted by Patman
Originally Posted by ecotourist
Originally Posted by The Critic
Don't forget to register that battery. Otherwise the charging algorithm will not be correct.

I assume you're talking about an AGM battery. What do you have to do?


It's not an AGM battery, it's the Everstart Maxx (same one I have in my Civic which is serving me well and I've used previous versions of this same battery in many cars over the past 25-30 years with great success)


BMWs (newer ones like yours) use a "smart" charging system which adjusts the charging profile based on the age of the battery. A 5 year old battery will be charged more aggressively than a new one. When the battery is replaced, the system needs to be informed that a battery replacement was performed. Otherwise, the new battery will be charged too aggressively and will fail in a short amount of time.
 
Originally Posted by The Critic


BMWs (newer ones like yours) use a "smart" charging system which adjusts the charging profile based on the age of the battery. A 5 year old battery will be charged more aggressively than a new one. When the battery is replaced, the system needs to be informed that a battery replacement was performed. Otherwise, the new battery will be charged too aggressively and will fail in a short amount of time.


I'm pretty sure they did that, as it took them a little bit longer and the mechanic mentioned he had to do a few different things after the battery was installed.

But how does the system adjust itself once the battery gets older?
 
In my last truck, I used Optima Red Tops for a while. After a few years with one, I noticed the truck was starting to have starting issues. I took it in and found out that the warranty expiration date was THAT DAY (I had the receipt in the glove box)!! I don't think I had to pay anything, either, since it was still under the full replacement deal.
 
At the beginning of this thread I mentioned that I wasn't sure if it was the original battery or not, but the more I think about it the more I am sure that it was indeed the original battery. The one that came out of the car was a BMW battery, and since we got the car in 2014, I doubt that the original owner would have had to replace the OEM battery in just 4 years time, batteries up here usually last much longer than that (especially huge batteries like this one has) So that's pretty good that the original battery lasted about 9 years!
 
Originally Posted by Patman
Originally Posted by The Critic


BMWs (newer ones like yours) use a "smart" charging system which adjusts the charging profile based on the age of the battery. A 5 year old battery will be charged more aggressively than a new one. When the battery is replaced, the system needs to be informed that a battery replacement was performed. Otherwise, the new battery will be charged too aggressively and will fail in a short amount of time.


I'm pretty sure they did that, as it took them a little bit longer and the mechanic mentioned he had to do a few different things after the battery was installed.

But how does the system adjust itself once the battery gets older?

The system is supposed to adapt based on battery resistance, capacity, etc. So you would think that it should be able to adapt to a new battery. But service procedure calls for a reset/registration whenever a new one is installed.

More info here:

https://stevesorensenmechanical.com.au/blog/battery-registration-and-programing/
 
I now recall exactly what the technician said to me when I asked him what was taking so long (I saw that they had installed the battery but over a half hour had passed) and he mentioned something about how on BMWs he had to do something with the "power distribution" because it was a new battery. So I'm confident he did the correct procedure.
 
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