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Battery

Glosphil

Active Member
Nov 10, 2004
456
197
Gloucestershire
Track toy is correct. Also the error codes thrown up as the battery was failing won't be cleared.

It would appear that the place I bought my replacement battery from isn't prepared to bear the cost of the 'coding' equipment it would need. Not surprising really as every manufacturer (counting Audi, VW, Škoda & Seat as one) needs different equipment, or at least different licenced software.
 

redone

Active Member
Nov 28, 2023
63
23
Battery life is reduced due to thinking its an old battery and not a new one. No VW Have not designed an automated way and BMW are the same.
From a BMW Site but applied to VAG motors
As your battery gets on in years and gradually loses its charging capacity, the vehicle adjusts the amount of energy needed to recharge to operate at optimal levels. The older the battery the more charging it requires. Registering your battery lets the relevant control module know that a new one is installed and as a result, the vehicle will reset the old battery statistics and won’t try to overcharge the new battery thinking the previous one is still inserted.
how did we manage for all these years…
 

redone

Active Member
Nov 28, 2023
63
23
Track toy is correct. Also the error codes thrown up as the battery was failing won't be cleared.

It would appear that the place I bought my replacement battery from isn't prepared to bear the cost of the 'coding' equipment it would need. Not surprising really as every manufacturer (counting Audi, VW, Škoda & Seat as one) needs different equipment, or at least different licenced software.
pretty sure if you have a fancy topdon or w/e it would do 99%. are they called blockbuster batteries?
 

tracktoy

Active Member
Jun 11, 2023
582
400
Track toy is correct. Also the error codes thrown up as the battery was failing won't be cleared.

It would appear that the place I bought my replacement battery from isn't prepared to bear the cost of the 'coding' equipment it would need. Not surprising really as every manufacturer (counting Audi, VW, Škoda & Seat as one) needs different equipment, or at least different licenced software.
Not really, all they would need is OBD11 that covers all the VAG and BMW Motors for this purpose.
 

LeylandVCDS

Active Member
Apr 20, 2015
394
233
Leyland, Lancashire
The car alters the charging profile based on the age of the battery. If you do not tell it that you have a new battery, it could damage or shorten the life of the new one. Like for like doesn't matter. The car needs to know that a new battery is fitted and that includes the amps and CCA of the battery. No idea why modern technology can't sort that out!
Exactly, not only does it need to know the battery is new, but any change in CCA and cranking power needs to be logged on the car, as the charging profile will not charge the new battery to full potential with incorrect settings - I had this exact problem on my 2014 Toledo that I got 18 months ago. Yes it had only done 6600 miles from new, so had obviously done a lot of standing around which had destroyed the original battery. An upgraded battery had been fitted - yes it worked, but it obviously wasn't right until it was coded as for one thing the start-stop wasn't working. All came to life perfectly as soon as I had a play with VCDS and put the new correct battery specs in
 
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Sham

Active Member
Sep 15, 2023
66
5
Exactly, not only does it need to know the battery is new, but any change in CCA and cranking power needs to be logged on the car, as the charging profile will not charge the new battery to full potential with incorrect settings - I had this exact problem on my 2014 Toledo that I got 18 months ago. Yes it had only done 6600 miles from new, so had obviously done a lot of standing around which had destroyed the original battery. An upgraded battery had been fitted - yes it worked, but it obviously wasn't right until it was coded as for one thing the start-stop wasn't working. All came to life perfectly as soon as I had a play with VCDS and put the new correct battery specs in
Hi guys sorry to jump in on the thread need a bit of advice please. Need a new battery but low on funds seen a like for like on eBay second hand AGM 096 for my 2015 seat Leon as its second hand will
It need coding ? Ot if I buy a new one I can only afford the EFB one would I need to code it ? Or will it start and run when I put it in ?? Thanks
 

BillyCool

Active Member
Jan 16, 2020
697
274
Leicestershire, UK
Hi guys sorry to jump in on the thread need a bit of advice please. Need a new battery but low on funds seen a like for like on eBay second hand AGM 096 for my 2015 seat Leon as its second hand will
It need coding ? Ot if I buy a new one I can only afford the EFB one would I need to code it ? Or will it start and run when I put it in ?? Thanks
Any change in battery needs coding as you are basically telling the car that you have changed battery. The reason is that the car will use a different charging profile for a new battery than an old one.

The challenge here is that you are buying a second hand battery, so neither you or your car know how new/used it is, so the charging profile will not be correct.

Personally, I'd avoid a 2nd hand battery as you really don't know what you are getting. I appreciate that funds may be tight but you could be throwing good money away.

A quick Google will show that it is not recommended to change AGM for EFB.

Do you have a link for the battery on eBay? You can get a new 096 from Tanya for about £110 delivered.
 
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Sham

Active Member
Sep 15, 2023
66
5
Any change in battery needs coding as you are basically telling the car that you have changed battery. The reason is that the car will use a different charging profile for a new battery than an old one.

The challenge here is that you are buying a second hand battery, so neither you or your car know how new/used it is, so the charging profile will not be correct.

Personally, I'd avoid a 2nd hand battery as you really don't know what you are getting. I appreciate that funds may be tight but you could be throwing good money away.

A quick Google will show that it is not recommended to change AGM for EFB.

Do you have a link for the battery on eBay? You can get a new 096 from Tanya for about £110 delivered.
Thanks for the reply bro yeh il post the link below
 

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Sham

Active Member
Sep 15, 2023
66
5
Couldn’t get link up to post it but that’s the add brother he’s a breaker and sells them all the time he says and for £50 it’s AGM aswell ??
 

LeylandVCDS

Active Member
Apr 20, 2015
394
233
Leyland, Lancashire
So could I code it using a OBDelevn vag dongle ??
Yes, OBD eleven will sort it no problem.
When you swap out any battery for another, either used or new, it needs to be coded. Serial number to be changed, and also check the charge capacity is also the same. If not, change it by coding to the value of the new value. The adaptive charging in the car won't work properly without all the settings being right, as an example, I found that until I coded my new battery on my wife's Toledo, the start/stop didn't work as it should.
 
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ViperSlider

Active Member
Mar 26, 2024
99
54
Cardiff, S.Wales
A good quality battery has an average lifespan of 4-6 years, after that you can start to get issues like cell failure. I've had batteries last up to 8+ years without issue but that is the exception and not the usual rule.

I'd avoid a used battery unless they can confirm the week and year of manufacture. For all you know that battery could be 10 years old and last you a month.

Also, AGM batteries don't react well to being fully discharged and you have no idea if this has been fully discharged and if it has, how many times.

Even though that add mentioned warranty, that's just a copy/paste from the Bosch website or alike and that wouldn't be valid for a used battery as it's 4 years from original date of purchase. Used it's nothing more than a doorstop when it breaks.

It's not that much more to get a good quality new AGM battery like Varta or Exide from places like Tayna.
 
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BillyCool

Active Member
Jan 16, 2020
697
274
Leicestershire, UK
Couldn’t get link up to post it but that’s the add brother he’s a breaker and sells them all the time he says and for £50 it’s AGM aswell ??
For me it's a big risk buying 2nd hand. You can get a new warrantied battery for just over £100 so why take the risk?
 
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Sham

Active Member
Sep 15, 2023
66
5
Thanks for the reply and ur advice. Once Iv got it in if I have any issues il give u a shout if u don’t mind j

thanks il be ordering that today brother
Quick question bro the one currently in my car is 68AH this one is 72AH will that make a difference ? More so will it be ok and run properly without issue as it’s more powerful ?
 

TheSwede

Active Member
Oct 20, 2018
356
197
Sweden
As long as the battery fits it's ok with 72AH. When you change battery parameters don't forget to adjust capacity from 68 to 72 AH.

I replaced my battery with a 75AH, from old 69 AH.
 
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