I've ordered a new Varta agm battery to replace the existing Moll efb on my Octavia. Should get that on Tuesday and I have an Ancell VD700 scanner/reader that I can us to re-code the new battery. I've read various articles and watched some Youtube videos and some state that the new agm battery should be coded as fleece and others are stating binary agm. Which one is correct and what's the difference ? Is there a difference ?

Fleece for AGM, change the serial number and the Amps to suit your new battery. Job done👍

 

 

For reasons known only to VAG they call an AGM battery 'fleece'.

4 hours ago, PetrolDave said:

For reasons known only to VAG they call an AGM battery 'fleece'.

It is because they contain absorbed glass fibre fleece.

Thanks everyone for the replies. Much appreciated. Fleece it is then !

Hi All,

 

Time for battery change? After long time search on web, things come clear gladly to Continental tech description:

 

Absorbed Glass Matt AGM = Absorbed Glass Fleece AGF

 

https://www.continental-aftermarket.com/en-en/products/spare-partsrepair-parts/batteries/agm-battery

 

The option BinaryAGM seems to be used if there available)) but think for high performance with spiral-wound AGM.

 

OEM was black battery from Varta but codet as JCI - JCB 68Ah Fleece and not VA0, but well nevermind what names they sell for assembly

 

Replaced with: EXIDE EK700 coded initially as Fleece 70Ah TU3

 

But then for test did change technologyto BinaryAGM, and the 96% charged battery as Fleece was now showing 82% charge with BinaryAGM.

* While charging voltage was kept in range 13.6-14.2V for both cases.

It's known this exact battery EK700 can handle about 7-10% over the values on the sticker, means in fact it handle true 75Ah, that's shown by different tests. This means having programmed as BinaryAGM a normal AGM battery(not top brand) can result to be charged at maximum all time or mostly if daily route is over 50km, which not good as not allowing time to be discharged a bit, unless leave with music periodically, while for EK700 or similar good branded it maybe wont cause any damage. And that's why many people saying to have any of this two type coded and no one see issues, because depends in short time not but after couple years the capacity may be affected if not right setup for drive mode etc...

So an adwise for those who having short routes, check periodically your battery and if measurements shows battery constantly not charged c.a. 80% or less, and never 90/100% , is maybe a good idea to have it setup to BinaryAGM this in fact will show less charge % but real battery will be better charged, as the logic for generator is slightly different allowing faster and higher charger.

 

Again, setup as Fleece is good by default nothing worse, but think BinaryAGM still accepted in two scenarios, when long daily routes only with some TOP of the normal AGM batteries on the market (as those having a bit over reserve which positioning as high power delivery as an spiral-wound AGM), and second scenario is when daily short routes not allowing your AGM being charged 90-100%.

 

Hope that helps to put clearance on this subject.

 

Thanks, all good stuff every bit of extra information helps, I will replace the Exide EFB in my wife's August 2015 VW Polo 1.2TSI with an AGM battery with slightly higher capacity as that seems like being a smart move, but so far the factory fitted EFB has stayed alive longer than expected probably due to me making sure that it gets connected to a smart charger, CTEK when it was not used very much during the 2020 and 2021 lockdown periods, its capacity measures as being 500A CCA EN now, down from 640A CCA EN - well that was its rated value, and it measured slightly above that when newly delivered and in circuit in the car.