AGM Battery

[Andyt9763]

Looking to replace the EFB battery with an AGM,Tanya site lists a Bosch S5 A08 but I wanted to use the existing OEM fabric cover,and the above one is 278mm as opposed to 242mm on the EFB one.
Saw this one which looks identical to the S5 A08 but the correct size 242mm

S5 A05 Bosch AGM Car Battery 12V 60Ah Type 027 S5A05

S5 A05 Bosch Car S5 Battery - AGM (Absorbent Glass Mat) Bosch Group are one of the leading battery manufacturer companies in the world and have been delivering quality German engineering in the automotive industry for more than 100 years! Bosch is a world renown company name that have and still...

www.tayna.co.uk

It says this doesn’t fit but can’t see why,as its size is identical to the EFB one and the posts are same sides,at a loss as to why it doesn’t fit.
Anyone have an answer?

 

[Karollo]

It may show that it doesn't fit because of the dimensions, but rather because of the battery type (EFB vs AGM). It's possible that the search engine is rigidly stuck on the original battery type.

 

[RUM4MO]

It sounds like your Leon is a lower powered and so maybe lower speced car, so at the factory it was fitted with the smaller battery - which is exactly wht is fitted to my wife's 2015 VW Polo 1.2TSI 110 SEL.

I sort of planned to change its EFB to an AGM and "move up one size" - and for that car, that involves buying a new battery tray and the insulating blanket, I've done all of that but the original battery still refuses to die enough to encourage me to implement all these changes, probably it lives on as I've taken care of it and how we use that car!

So, what you can do is, either buy this "one size up" and get it coded to the car along with buying a new insulating blanket, which from memory costs a bit more than you might expect, or stick with the same amp hour and CCA of your original EFB one that is currently fitted, and get that coded to your car.

If in doubt about Bosch batteries, just go onto their website and get the Bosch code of the one that you want, and order that in from Tayna batteries.

Really it is only the capacity in amp hours and the cold cranking amps, ie CCA that you are aiming to match - along with the profile/shape and terminal layout - just check that the terminal layout is the same as the one you have in the car at the moment , to make sure that + - or not swopped over. Just be aware that as time moves on, capacity and CCA might creep up a bit so they could be slightly higher than the old EFB in your car, so don't worry about that.

Edit:- I'm guessing that the battery tray in your Leon can accomodate the bigger size, as that is what gets fitted to bigger engined and higher trim level cars, the one other slight worry about fitted a slightly bigger/longer battery is, "will the leads still fit okay?" as they do tend to be designed to just fit.

My "plan B" is to sell this bigger Bosch AGM to my daughter for use in her Leon Cupra, but as her battery is dying but not yet caused a problem, that will be very tricky to do! (younger people normally only spend money after the event)

 

[RUM4MO]

In fact, now that I've checked both Bosch batteries, the S5 A05 should fit perfectly to replace your original same profile/size or frame size EFB which will be a 320A (DIN)/640A (EN) 59AmpHour size - or near enough that spec depending on the age of it and your car.

 

[Andyt9763]

It may show that it doesn't fit because of the dimensions, but rather because of the battery type (EFB vs AGM). It's possible that the search engine is rigidly stuck on the original battery type.

Thanks for the reply.
I don’t think that’s the reason,car is Leon 2017 1.4 TSI,and battery tray has three different sizes it can adjust to,As said I didn’t want the bigger 278mm S5 A08 as it would mean getting a bigger cover.

 

[Andyt9763]

In fact, now that I've checked both Bosch batteries, the S5 A05 should fit perfectly to replace your original same profile/size or frame size EFB which will be a 320A (DIN)/640A (EN) 59AmpHour size - or near enough that spec depending on the age of it and your car.

Cheers for the reply,I can’t see why it wouldn’t fit either,but no battery site says it would fit.
Strange.

 

[RUM4MO]

The bottom line is, if this is the direct AGM equivalent of an EFB and your car has that frame size, capacity, CCA (EN) and terminal configuration - which the AGM you have picked, has, then that is the correct battery for what you want to achieve.
The major down side is that it will cost less, but I'm sure that you can handle that even if the battery sellers would rather not.

 

[RUM4MO]

One other comment/observation:- on that website, when you go to the "batteries" listing and not "batteries sorted by reg number", the battery you get offered is high up the "best sellers" on page 1, the battery you want to buy is on page 2!

 

[Andyt9763]

One other comment/observation:- on that website, when you go to the "batteries" listing and not "batteries sorted by reg number", the battery you get offered is high up the "best sellers" on page 1, the battery you want to buy is on page 2!

Cheers,appreciate the feedback

 

[nd-photo.nl]

The bottom line is, if this is the direct AGM equivalent of an EFB and your car has that frame size, capacity, CCA (EN) and terminal configuration - which the AGM you have picked, has, then that is the correct battery for what you want to achieve.
The major down side is that it will cost less, but I'm sure that you can handle that even if the battery sellers would rather not.

Exactly this. I also replaced my battery after I bought my Cupra. I went from a Banner EFB battery to a Exide AGM battery. Same dimensions, but higher capacity

Just like a DOT code on a tire, a battery also has a date code (week 22 2015, so 10years old)

Exide EK720

Don't forget to change the values in VCDS (or other device) where needed

 

[Andyt9763]

Exactly this. I also replaced my battery after I bought my Cupra. I went from a Banner EFB battery to a Exide AGM battery. Same dimensions, but higher capacity

Just like a DOT code on a tire, a battery also has a date code (week 22 2015, so 10years old)

Exide EK720

Don't forget to change the values in VCDS (or other device) where needed

Cheers,I’ve got a mechanic mate who can do it

 

[SuperV8]

Also change the battery type to 'fleece' which is VAG's code for AGM battery

 

[nd-photo.nl]

Also change the battery type to 'fleece' which is VAG's code for AGM battery

Pro Tip indeed. Don't use AGM (which sounds counterintuitive), but @SuperV8 is right

 

[Andyt9763]

Much appreciate all the helpful comments fellas.

 

[Andyt9763]

So stuck with EFB battery bought the one below had the serial no altered by one digit as suggested,stop start now not working,looks like a trip back to mates to check everything is ok.
I’m thinking it’s not seeing the battery change for some reason.

S4 E05 Bosch Car Battery 12V 60Ah Type 027 EFB S4E05

 

[Walone]

So stuck with EFB battery bought the one below had the serial no altered by one digit as suggested,stop start now not working,looks like a trip back to mates to check everything is ok.
I’m thinking it’s not seeing the battery change for some reason.

S4 E05 Bosch Car Battery 12V 60Ah Type 027 EFB S4E05

My car is a 2016 MY ST FR 1.4ACT, it has the same Banner EFB battery as in post #10 above and the length is 278mm x 175mm width. Seems strange that your battery is smaller!

 

[nanobis]

Also change the battery type to 'fleece' which is VAG's code for AGM battery

Thanks, this just saved me a load of issues.

I've just fitted a new AGM battery Yuasa, AGM 096. I fitted it at work on my lunch break yesterday and used our Yuasa Scan/programmer tool (I work at Halfords) and it had AGM Bipolar, Fleece, EFB, Gel, Lithium and normal/wet Gel. I programmed it to the right settings it should have been, 760 En, 70ah, but didn't know about fleece an selected AGM Bipolar instead. cleared all the Codes, set the Ah and maker data. all should be good.
Thing is after I got home after work 30min drive, I still got 12v Low charge by driving on the dash. So I've charged it all day today via a tender. It still gave me a 12v Low on the dash after 8hours on charge and it showing 100% on the health test, and even checked the alternator, all showed good. In my frustration i've discovered this post and few more on this subject.

I dug out my OBD Eleven out to check all the settings and for some reason the Battery got coded as a 270ah battery EFB. I probably should have just recoded it again tomorrow at work but I've ended up buying my self Pro subscription again to re code the battery in, made sure to select Fleece, looks like all the settings have stuck this time and hopefully the issues have gone away.

Little annoyed I've had buy a subscription again, but I'll make use of it with some coding I wanted anyway.

 

[RUM4MO]

I always considered that Yuasa "must" be a trusted battery brand, but it seems like many professional workshops have just too many early life failures when supplying and fitting them, which in turn gives these workshops a bad name with their customers, so maybe not the brand to go for, I don't know where Yuasa in Europe source their battery manufacturing from, like most of the main players they have probably handed over that "dirty job" to somewhere other than where you might expect them to be manufactured, maybe even India.