Hi,

Are there any fellow owners of a Yeti L&K 1.4Tsi with stop start that can confirm mine has been equipped from new with the correct battery?

It's a long story but and I want to put to rest a nagging thought!

I attach snap of battery label.

Much appreciate any help with this

 

 

Yes mine has an identical label.

This is the same spec as fitted to my 2016 Octavia SE Sport 1.4TSI.

Every supplier I have checked apart from a Skoda dealer gives the battery for my car as a 70AH AGM, Skoda customer services unwilling to say anything other than go to a Skoda retailer. You may find something similar with the Yeti

 

 

1 hour ago, Smokeyjoe said:

Yes mine has an identical label.

Thanks, seems like it is right then. Much appreciated

1 hour ago, Octy0GG said:

This is the same spec as fitted to my 2016 Octavia SE Sport 1.4TSI.

Every supplier I have checked apart from a Skoda dealer gives the battery for my car as a 70AH AGM, Skoda customer services unwilling to say anything other than go to a Skoda retailer. You may find something similar with the Yeti

 

 

Thanks, yes the ones I looked up all had higher capacity too. Oh well...

On a slightly related note I just noticed this in the manual. Mine doesn't have start-stop but for those that have, it's probably worth making a mental note if you are ever likely to use jump leads! 

 

Quote

On vehicles with the START-STOP system, the jump-start cable of the charger must never be connected directly to the negative pole of the vehicle battery, but only to the engine earth » Fig. 175.

 

Edited 23 June, 20188 yr by muddyjim

^^^Anyone know the reason for this?

One point - the EFB stands for "enhanced Flooded Battery" which is more like a standard lead-acid battery, vehicles fitted with automatic engine stop-start are quoted by Skoda as requiring an AGM battery. Practically speaking, apart from price, I'm not sure that there is a lot of difference between the two types and interestingly, my original MY16 Octavia battery (AGM) was replaced under warranty in its first year due to auto stop issues - the dealer fitted an EFB battery as the replacement.  

Yes, because earthing through the body reduces or removes any spikes that can occur if connected directly to the battery.
How that works I do not know, but the instruction is common across many cars using AGM batteries and/or stop/start systems.

8 minutes ago, Robjon said:

^^^Anyone know the reason for this?

The reason quoted is to minimise the risk of electrical "spikes" being transmitted into the sensitive electronics of the vehicle. On older battery types, it was also to prevent sparks, when making the final battery lead connection, from igniting the gas (hydrogen!) which may be venting from the cell caps.    

18 minutes ago, Warrior193 said:

 my original MY16 Octavia battery (AGM) was replaced under warranty in its first year due to auto stop issues - the dealer fitted an EFB battery as the replacement.  

There seems to be no real consistency as my car (2016 1.4 TSI) was fitted with an EFB from new, the dealer I contacted was clear that they would not even consider fitting anything other than another EFB as per original fitment. Perhaps everyone in the dealerships is not getting the same memo.

I agree that there appears to be inconsistent advice from dealers - however, Skoda is very clear in my handbook - "vehicles fitted with engine auto stop-start require to be fitted with a AGM battery"

33 minutes ago, Warrior193 said:

I agree that there appears to be inconsistent advice from dealers - however, Skoda is very clear in my handbook - "vehicles fitted with engine auto stop-start require to be fitted with a AGM battery"

Looks like there may have been a change in the Owner's Manual at some point. In the section Disconnect/reconnect and charge P179 mine just says "The new vehicle battery must have the same capacity, voltage, current and size as the original". Can't find the reference you quote (It may be there and I'm just missing it) Date on back cover of my manual is 05.2016. Is yours a different date or am I on the wrong page? 

 

https://www.yuasa.co.uk/info/technical/agm-efb-explained/

 

"Improved flooded battery technology, increasingly referred to as EFB technology in the market, offers a cost effective solution for entry level Start-Stop vehicles. EU emissions targets for these vehicles are lower than those set for higher performance models. This has led to manufacturers developing a battery technology that meets the demands of Start-Stop operation in a higher state of charge than expected from AGM technology, but lower than that expected from standard wet-flooded starter batteries."

 

My Superb 1.4 tsi is also fitted with an EFB battery

 

Also see:-

 

 

Edited 23 June, 20188 yr by bigjohn

On 23/06/2018 at 21:46, Octy0GG said:

There seems to be no real consistency as my car (2016 1.4 TSI) was fitted with an EFB from new, the dealer I contacted was clear that they would not even consider fitting anything other than another EFB as per original fitment. Perhaps everyone in the dealerships is not getting the same memo.

 

They should have fitted an AGM battery !!!  I suspect they fitted an EFB as they are much cheaper 

10 hours ago, AudiPhile300 said:

 

They should have fitted an AGM battery !!!  I suspect they fitted an EFB as they are much cheaper 

 

All the smaller cc tsi Skoda stop/start engines  seem to be fitted with an EFB battery

 

From https://www.yuasa.co.uk/info/technical/agm-efb-explained/ " EFB technology is now factory fitted to numerous entry level Start Stop vehicles"

 

 

Edited 19 July, 20187 yr by bigjohn

This is not necessarily accurate but my take on what I've learnt so far.

 

Vehicles with stop/start and energy recovery which modern Skodas have are referred to as Micro hybrids.

 

Start/stop and energy recovery require EFB at a minimum, AGM is better particularly for energy recovery. The charging system is "smart" and there are (diagnostic accessable) settings that need to match accurately the battery fitted, manufacturer code,  EFB or AGM type, Ah capacity etc. This is so the charge/voltage management/energy recovery is correct for the battery fitted. From what I can suss out, the battery is rarely or perhaps is never fully charged by the smart alternator but at a variable target level depending on the consumers switched on such that the battery always has some reserve that can be used for energy recovery but also enough charge for stop/start and power during a stop period.

 

Complicated stuff.

 

The jump start/charging earth point is that there is current monitoring and electronics between the battery negative terminal and earth to measure/track battery charge. Connecting directly to the negative terminal could confuse the smart charging circuit and charge data which might have bad consequences, start stop not working for instance or under/over charging.

 

Of course I might be completely wrong.

Edited 19 July, 20187 yr by xman

@xman - Thank you; yours is the most logical explanation of the charging system (and of the need to use the jump start earthing point) that I have seen on these pages.

 

Whether or not it's right...