Model Year 25/26 Key Battery Needs Replacing After 6 Months?

[Seastormer]

I didn't know about that. Thanks.
I'll carry on putting mine in the faraday box though - can't be too careful, especially as I recently had an expensive vehicle (not the Cupra) stolen off my front drive by those lovely local gypsies.

I knew about it but still put my key in a metal box that I keep upstairs in the room furthest from the car. I have extra security, (Disklok), House alarm system, CCTV cameras, security lights and strengthened doors. I like the belts and braces approach, better safe than sorry.

 

[Tell]

The more advanced criminals take the front door out as their solution to relay thief being blocked. I got showed one video by someone I know of the failed break in. They got the door open, they came downstairs and they fled. Was the text book one. They sold the house and moved having been violated. Essex for you.

 

[Momochi]

Why use a faraday box when you can temporarily disable the Keyless Access easily?

From the Owners' Manual:

 

[Momochi]

Ze Germanz recommend replacing the wiper blades every 6 months, the 12v batteries are usually German made Varta or Clarios and the key fob batteries from the factory tend to be Panasonic.

There's a lot more demand placed on components now, which is why the batteries don't seem to last, the wipers on the other hand, are just turd.

Panasonic CR2032s are good, only if "genuinely" made in Japan or Indonesia.

(Beware of cheap Panasonic which claimed to be made in Japan - they are most probably low quality counterfeits from China)

Those Varta CR2032s from China are OEMs from less well-known factories which I would avoid. Some expensive ones from big Chinese brands are in fact on par with Panasonic in terms or quality.

 

[James_R]

VWG uses Panasonic batteries in their keys from the factory and supplies Varta to the dealer network.

I've bought varta batteries (CR2032s, AAs, AAAs) in bulk for years and they've never missed a beat

 

[Bahnstormer_vRS]

Why use a faraday box when you can temporarily disable the Keyless Access easily?

From the Owners' Manual:

I do this with my Ateca parked outside my house overnight and put the key in a Faraday pouch.

Battery life? Think I got about 15 months out of the first battery; car is now 18 months old.


Guy

Sent from my Galaxy S25 Ultra using Tapatalk

 

[Tell]

VWG uses Panasonic batteries in their keys from the factory and supplies Varta to the dealer network.

I've bought varta batteries (CR2032s, AAs, AAAs) in bulk for years and they've never missed a beat

Yes my Ateca batteries were original Panasonic. I use the standard practice of the IRA bombers, Duracell . They didnt want to blow themselves up so always used Duracell. Fluffy toy on the box or what have you.

When the dealer reprogrammed the door entry on one of their dealer software updates they changed my battery back to a 2025 away from the Skoda user mod of the early Kessy remotes. Thought funny its gone flat already, opened it up and one of those Vartas put in it. Swapped back to 2032. Probably when they did that Kessy handle reprogramming their pdf said change the battery.

 

[Tell]

Why use a faraday box when you can temporarily disable the Keyless Access easily?

From the Owners' Manual:

That's the newer implementation. That option was not available in it's original form. The Ateca was the first Seat to get Kessy, 10 years ago. We were ahead of those Leon's and Formentor's but behind Skoda that already had it. Now they bring out the other tricks on the menu of unlock when approaching and lock when leaving. You could activate these on the original implementation by coding. Spanish forums had that.

I programmed in one touch locking which for two years Seat left out. Rather stupid you had to wait 3 seconds holding the button to get mirrors in and lock. They thought they would have a curious way of locking the car or just I'll informed of what the system could do.

It was my reprogramming that got wiped when they did that Kessy update. I had to program it back in.

 

[Steve-Formentor]

Why use a faraday box when you can temporarily disable the Keyless Access easily?

From the Owners' Manual:

Just turned kessy off so will see how I get on and whether I miss it too much. As I have a waterproof key case, it's a pain changing the battery.

 

[trew]

Why use a faraday box when you can temporarily disable the Keyless Access easily?

From the Owners' Manual:

For me it's easier to put my key in a box than remember to go through that process every time I get out of the car.

 

[trew]

...I use the standard practice of the IRA bombers, Duracell . They didnt want to blow themselves up so always used Duracell....

Maybe those two IRA bombers in St Albans used cheap batteries - they blew themselves to smithereens when trying to plant their evil device outside the Alban Arena. They won't make that mistake again.

 

[Tell]

For me it's easier to put my key in a box than remember to go through that process every time I get out of the car.

Crimes low where I live now and probably a 10 year old Ateca isnt something they want. The keys are kept deep inside the house but its always worth a thought when out. The night time badgers operate a security patrol, they give you enough of a fright in the dark with their bashing about . As said I only dig out the keys when I'm giving the car to the dealer or a tyre place. Rest of the time I never touch them except for that battery change.

 

[Momochi]

Just turned kessy off so will see how I get on and whether I miss it too much. As I have a waterproof key case, it's a pain changing the battery.

I got mine from Taobao last winter, costing me around US$1

Now they are selling at around US$0.50

 

[Momochi]

That's the newer implementation. That option was not available in it's original form. The Ateca was the first Seat to get Kessy, 10 years ago. We were ahead of those Leon's and Formentor's but behind Skoda that already had it. Now they bring out the other tricks on the menu of unlock when approaching and lock when leaving. You could activate these on the original implementation by coding. Spanish forums had that.

I programmed in one touch locking which for two years Seat left out. Rather stupid you had to wait 3 seconds holding the button to get mirrors in and lock. They thought they would have a curious way of locking the car or just I'll informed of what the system could do.

It was my reprogramming that got wiped when they did that Kessy update. I had to program it back in.

Yup, VAG seems only introducing this "keyless deactivation" feature a decade ago.

My previous A4 8K has keyless entry but with no such deactivation feature. But as I parked my car quite a long way from my previous dwelling it didn't really matter .

Now my KL8 is parked in the underground carpark, and I am living a few floors above it, thus this feature is of no use to me neither.

 

[Tell]

You have to do it with coding in the earlier implementations.

 

[Madkaz]

Anything special to do after changing the battery ?
My key died after 1,5 year, so I naturally changed the battery, but the key is still not working, the small red led is not blinking when I use the key

I tried the sync process from the manual, I was able to start the car but the key remain unusable. Did it just literally died ?

 

[James_R]

Make sure the battery is in the right way around and there's no stickers on it.

 

[Tell]

Or it could be duff one. I wipe place where the sticker was if it bad the bitter bite sticker and take care not to get grease off you fingers on the edge where it will make contact.

Where the meter comes in on the voltage but I dont bother to check these days. No flash of red when you press it, its not going to work so no point in going out to the car.

 

[Momochi]

Never touching both the top side AND the bottom side with your tool or 2 fingers at the same time. Only handle the CR20xx battery with your fingers touching the edges.

 

[Tell]

The edge is where it makes connection so its the edge... least in mine which has to be kept clean, centre where one pin makes, contact edge the other. Suspect our trusty dealers wear gloves.

I dont use a knife as per this video but a thick headed screwdriver and twist. A bradel to get it to ping out. The guy uses a screwdriver his finger to catch it. This was 2025, same as 2032 edge connectors make the contact so its the edge that needs to be kept clean and the bitter bite sticker removed off the surface if stuck on.

I guess a cheap exhausted battery if a replacement doesn't work. Vag use Panasonic as James pointed out. I use Duracells bought from Amazon main store not their market place seller options.