2 hours ago, Keld said:

Thanks to all for the many responses to my question. However, the responses quickly turned into a discussion about software and firmware. I realise that the software level of the infotainment system probably has nothing to do with the draning of the battery. And yet, an infotainment system that doesn't shut down properly when the car is turned off may still drain the battery. The bottom line is that I have no overall knowlegde about how the various systems and computer units in my car interact with each other.

Anyway, I just wanted to know how to locate my 12 Volt battery. My intention was to replace the battery myself when the time comes. And it will come, sooner or later, because no acid lead battery can endure repeatedly being discharged below 12 Volt. But now I have learned that a replacement of the battery can only be done by someone who knows about the coding of the battery. I assume that this coding is some kind of chip built into the battery in order to prevent us mortals from interfering with the servicing of our own cars.

I'm afraid that the same level of ignorance as mine exists among a large percentage of the service persons at the dealers. People who are supposed to help me instead of telling me fairy tales.

 

Take a look here: https://support.obdeleven.com/en/articles/9463949-how-to-register-a-car-battery-with-obdeleven
I personally haven't yet done this, because mine RS iV 12v battery is still good, but looks like it's possible to do so without going to the dealer.

43 minutes ago, yurimura said:

Take a look here: https://support.obdeleven.com/en/articles/9463949-how-to-register-a-car-battery-with-obdeleven
I personally haven't yet done this, because mine RS iV 12v battery is still good, but looks like it's possible to do so without going to the dealer.

Very interesting. Thanks

i had to recently change my 12V battery, but couldn’t find the location of the battery, so I went to a workshop instead. They could not find the battery either, so I dug deeper online and finally found it! There’s a PDF in German that shows the location PDF

Its in the trunk, behind many bolts and a cooling system that has to be unscrewed and moved a bit aside. The location is doable but requires some patience and more time than my previous cars, but it is swappable without having to go to a shop.

After swapping, the new battery needs to be programmed using some OBD tool, which can be done with tools that you can buy, but also a lot of electronic failure faults show up, which required the workshop to use some bigger OBD tool to clear up. If those tools like OBD11 can clear the faults then everything can be DIY.

skoda-octavia-iv-phev-hybrid-baujahr-ab-2020.pdf