New battery
- Thread starter Timdon
- Start date
Doesn't the battery have to be coded nowadays to the car? Gone are the days when you could just buy one from Halfrauds and fit it yourself ten mins later???
North West Surrey
step_change said:
I think later ones need coding - my 1 Series had an AGM battery and stop/start. The Battery lasted less than 5 years. And cost over £250 to replace by the time it was coded.
My E86 battery lasted 11 years and cost about £100 to replace.
My E91 battery lasted over 12 years, and cost £125 from the RAC - I had Home Start!
So progress seems to be going backwards and costing more! :lol:
tintoverano
Active member
when capacities (Ah) are the same there's no need for registration in theory, but still smart charging may throw errors related to uncleared stored voltage values, etc.
tintoverano said:
You still need to register the battery, even if the type is the same. With battery registration you are telling the intelligent charging module that the battery is new and that it needs to adjust the charging profile.
Further coding is needed if you change capacity or type of battery.
It's not even debatable that any new battery needs to be registered. Failing to register won't stop the new battery working, but you will shorten the life span of the new battery. Quite an expensive corner to cut if it fails again in a couple of years.
A
Anonymous
Guest
ph001 said:
Well R.E92 may well be right..
https://www.greencarcongress.com/2006/09/bmw_introduces_.html
According to that the car has to know what 80% capacity is, in order to trade off using regenerative braking vs running of of juice..
You could argue who cares, but a battery at the end of its life is maybe say 30% efficient so when the new battery is fitted it will have some effect either undercharging or overcharging, my brain hurts trying to work it out..
A full dissitatation is here..which supports R.E92's assertions (on this subject, I don't know what other assertions he has made!
)https://bimmertips.com/bmw-battery-registering-and-programming-explained/
...and how do you suppose the car knows the state of charge of the battery when it is first fitted?? Bearing in mind they are often sat on a shelf for 6 months in a stock room. Same when people connect a charger directly across the battery, bypassing the IBS module.
I'm not going to go into the technicalities of all this again as you can read it all on my other posts on the subject, suffice to say all the calculations are done through LIVE data measurements by the IBS module. It all sorts itself out after a few charge / discharge cycles.
I'm not going to go into the technicalities of all this again as you can read it all on my other posts on the subject, suffice to say all the calculations are done through LIVE data measurements by the IBS module. It all sorts itself out after a few charge / discharge cycles.
This is a funny one because everything in your head says it shouldn't matter and the car should be able to adjust whether the battery is old or new.
I have replaced the 2 batteries in our 2 cars and had both of them coded when fitted, for the extra small cost (if there was any) it doesn't really matter.
If the battery is not coded and fails to last the length of the warranty would it be replaced free of charge? (pardon the pun)
So who do you believe, the manufacturer or some random from the internet?
I don't know.
I have replaced the 2 batteries in our 2 cars and had both of them coded when fitted, for the extra small cost (if there was any) it doesn't really matter.
If the battery is not coded and fails to last the length of the warranty would it be replaced free of charge? (pardon the pun)
So who do you believe, the manufacturer or some random from the internet?
I don't know.
A
Anonymous
Guest
ph001 said:
I guess you either accept that Yuasa, Varta, BMW, Mercedes et all, plus loads of independents say you should, or go your own way..nice article here that clearly explains coding vs registration
https://www.youcanic.com/guide/bmw-battery-registration
Practically zero technical reasoning behind anything in that article. Just saying something should be done is hardly a valid argument. Of course BMW and many other manufacturers say it should be done as they all cottoned onto that cash cow about the same time.
I can categorically tell you that battery ageing is hugely variable depending on climate and a host of other factors that the IBS doesn't monitor. To derive a charging algorithm based on age alone is highly disingenuous - it just doesn't work like that. Hence why the IBS monitors things in real time.
My somewhat less monetary driven argument comes from 17 years as MD of a electronics engineering company specialising in industrial lead acid battery chargers. Make of it what you will.
I can categorically tell you that battery ageing is hugely variable depending on climate and a host of other factors that the IBS doesn't monitor. To derive a charging algorithm based on age alone is highly disingenuous - it just doesn't work like that. Hence why the IBS monitors things in real time.
My somewhat less monetary driven argument comes from 17 years as MD of a electronics engineering company specialising in industrial lead acid battery chargers. Make of it what you will.
i know from experience that if you buy a battery at halfords they never quibble, new battery every time. with ONE proviso, the length of the warrenty, so say you buy a 5 year battery from them and it fails after 4 - they will give you a new battery but only warrent it till the end of the existing guarantee, ie one more year. but hey.
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Anonymous
Guest
ph001 said:
Well you are entitled to , based on your own experience, choose your own actions..
I think on the Forum people asking for advice could reasonably expect a reasoned argument / documentary evidence .. if available..
Another article here.. https://bimmerscan.com/bmw-intelligent-battery-sensor-ibs/
makes it clear that the IBS does more than simply calculate age...it assesses the performance of the battery over time based on its response to load, temperature etc etc
An independent workshop states its experience of not adhering to battery registration here..
http://casestudies.atlanticmotorcar.com/tech-tip-bmw-and-mini-battery-registration-replacement-2/
I found out despite 40+ years in design, implementation, support of all types of hardware and software that it pays to have an open mind..
Not all knowledge transfer from one domain to another works perfectly, every time..