Question for car gurus!

No, it's ensuring the battery meets the requisite specifications (AGM, amp hours, reserve capacity, CCA) and it assigns the voltage regulator charging parameters.

Correct. Don O said..AGM batteries charge differently. They require more than just an alternator. true.
 
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My wife’s Mini battery is running low, if I disconnect it charge it will it need to re-register it ? We had to register when we got new battery so car recognise it. I wonder if you need to redo if you disconnect it.

Thanks
In advance


Replacing the battery in your Cooper Countryman involves removing the terminals. When you reconnect the terminals, your radio presets are likely to be cleared out. In some Cooper Countrymans, you may need to re-enter a security code to get your radio to work again. Check for this code in your owners manual - it will usually be either a sticker or small card in the booklet. If you can't find it, call Mini and they will give you the code for free. In many Minis, the transmission "learns" how you drive over time and makes adjustments, so you may experience altered driving dynamics as your car re-learns your driving style after changing the battery.
 
Battery registration is a BMW feature (Mini is a BMW product) and it is not required to re-register when you disconnect for charging.

The registration process is required to establish the alternator charging parameters.

I learned of this total BS when our 2 Hyundai's and one Toyota needed batteries.

I was researching conventional lead acid vs the newer style batteries, and nearly flipped a gasket in knowing that the A Hole car makers are making so much car operation subject to computer control, right down to recognizing batteries, how much wear is on them, fuel trim, all sorts of BS instead of just running the damn cars so common man can afford to drive and not go to the poor house maintaining them.

Lord Knows what will happen if I ever put a new battery n our '01 Z3 BMW.
 
And there's one even more expensive than that one...2017 S63 AMG

That is $1000+ more than I like to spend for whole running cars/trucks.

In my 42 year life of driving, I inherited our from new to beater 1972 Datsun 510.
I bought my first 4 wheel vehicle, 1977 Ford F100 truck in 1987-88, $2500.
Bought my 2nd, 1988 F250 4x4 in 1994-1995, Roughly $7500 ( likely over paid, but drove it from 130k to over 330k after that.

Bought numerous Rice Burner cars Mazda GLC, Sub Legacy wagon, 83 Honda Wagon for like $200-$400.
Inherited another '83 Honda Wagon, 2003 Saturn ( Totally soured me on GM) OMG @ the shippy Ignition and drive by wire ( computer) BS.

Also had a friend offer me a 2 for one, 1989 F150 + GMC Diesel Van for $600-$800 I forget LOL, and now my daily driver for the past 5 or so years. His father in Law offered it to me for$1. My 2004 F150. ( I like my Fords, but the level of computer controlled runability components) is not a happy zone for me. I had a No fun scenarion a few years back where the truck could not get over 25 mph and ran rough as hell. ( Hall Sensor in Distrib) caused computer to throw a code and trans/engine relationship ran like piss till I got new Distributor hall sensor and the computer reset.

OMG give me points and condensors, manual brakes and steering of my Datsun ANY DAYYYYYYYY

HAHA, I added up a rough estimate of my total purchase price of 18 cars/trucks in my lifetime, and I am under $12k for 42 years of driving.
 
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Robert, et al../

The scary part is if we add up how much other costs we incur while driving. Insurance and Tags, Gas are my primary cost items. Likely good guesstimate would be 75-100k in 42 years.

Tires, Brakes, Exhaust, plugs and wires, Oil and filters, and failed parts are super low cost on my drivers too. The thing I liked best about driving my Honda wagons was that I often got a set of 4 tires, rims and all for $1 a piece from auctions or private sales me and buddies would snap them up at. Never dismounted a tire. Just plug and play rims and all.

As for my trucks, that is where tires got pricey at over $100 a pop until I began going used tires on them too.
Brakes are cheap on Fords, Nissans, Honda's especially when done by self., same with Clutches. The key is to always have backup beaters to drive till the beater being serviced is fully road ready again.

I would be so content to just drive my beaters until I die.

LMAO, I just had a "Put it in perspective thought." OMG, I have spent way more ( like maybe 2x) on Guitars, Basses, Amps, Drums, Pedals than I have on all the vehicles I ever obtained. Holy Moly, I better sell off some of my expensive ones.
 
Registration ensures the correct battery is installed, but it also sets the voltage regulator on/off thresholds. When a battery begins failing, the alternator will charge more aggressively. If you do not register the replacement battery, the system will overcharge the new battery..
Sounds like a wacky charging system...
I don't know how other cars ever worked without it.
Disconnect the battery and it screws everything up? Brilliant design.

But IMHO that seems like the most retarded charging system ever.:pound-hand:
WTF would create such a diabolical device? That's pure evil and mental sickness.
 
Sounds like a wacky charging system...
I don't know how other cars ever worked without it.
Disconnect the battery and it screws everything up? Brilliant design.

But IMHO that seems like the most retarded charging system ever.:pound-hand:
WTF would create such a diabolical device? That's pure evil and mental sickness.

Or, look at the Mercedes S63 AMG with a $2,400 Lithium battery that is required to run all the car's accessories like stand-still A/C, champagne coolers, etc.

I know people who installed an Interstate MTX49-H9 in its place and the car wouldn't start...
 
I know people who installed an Interstate MTX49-H9 in its place and the car wouldn't start...

Back in the late 90's early 2000's, I was on a remodeling job once for a friend's job. I heard the lady homeowner muttering bad words in the other room at her vacuum that was not working right.

I muttered back and said, "Nothing but Over Engineered equipment, designed to fail." Her response was, " Yup, and I am an engineer."
 
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