Battery question

[CaptainLeadFoot]

Hi all,

It's time to replace the car's battery and I want to change to the AGM type.

Just wondering if anyone is using that and if you need to VCDS re-code the car to learn the new battery ? What brand and model would you recommend ?

[MikeFish]

No issue with changing battery.
I have a Banner AGM one because when I changed it I still had my big car stereo in and the Banner batteries are very good for this type of thing.

[CaptainLeadFoot]

Cool ! Are you using the AGM 605 01 ? do you know what is the size the battery compartment can fit ?

I'm thinking of the Varta AGM, but it looks to be rather big and at 29kg it's not light:
http://www.varta-automotive.com/en-gb/p ... 05-901-095

Comparing to the non-AGM one that I am using:
http://www.varta-automotive.com/en-gb/p ... 10-402-092

The site suggested for a lower capacity and cold cracking amp...I wonder if that is sufficient to start ?
http://www.varta-automotive.com/en-gb/p ... 95-901-085

[MikeFish]

I think the B7 uses the 020 size. Can't remember the dimensions though.

[irishmike]

You'll have to recode the remote central locking and one touch windows, that's about it and are easily done.

The size is 020, Bosch specs below

Amp Hours (Ah): 110AhCold Cracking Amp (CCA): 920CCALength: 393mmWidth: 175mmHeight: 190mm

One thing is the cranking amps, I wouldn't go lower. I had an issue with a battery that was just below full capacity and had issues starting. I needed to turn off auto lights and anything else to get it started.

[CaptainLeadFoot]

Thanks. Is it ok if the Amp Hours is a bit less ? From what is available here in Hong Kong, the AMGs available are either 105 or 95 Ah. Otherwise I have to go back to the traditional ones for 110Ah.