Hi,

I'm looking to replace the battery on a relations 2005 A4 Avant 2.0 petrol. The current battery is 60Ah/550 CCA, searching for replacements from various suppliers against the reg comes up with higher capacity batteries - 70 & 74 Ah, which are physically longer by about 35mm. So I have two questions;

Can anyone confirm what size battery it should have? It's obviously had new batteries during its life and I'm wondering if an undersized one was installed at some point.

Can the physically bigger battery fit? When I look at the mounting, it looks like there is a round end stop which might be movable to pre-set locations?

Thanks in advance for any help

 

 

 

 

 

 

Hello David, 

Thanks for being in touch with the forum, and I think you are wise to question this, since it’s not at all uncommon for owners to fit smaller capacity batteries on a so called cost saving principle. 
Apologies, but I’m not making much of the photo, so perhaps we can get back to first principles:-

Have you asked the owner to check under ‘Technical specifications’ ( or whatever the section is called) in the owner’s handbook? This should give you the recommended Ah and CCA rating for the battery - under Petrol engines.
It’s not uncommon for battery compartments to accommodate a ‘standard’ size battery, and a longer battery ( higher rated) normally fitted to the diesel variant, and the physically bigger battery can usually be fitted to the petrol engine if desired. 
Equally important as the battery capacity, is the battery quality, and personally, I only buy Varta/Bosch with a minimum of 4 years warranty - buying on line from specialist suppliers, at best prices. Battery Megastore, and Tayna (there are more) have been used to good effect. Tip:- You should find they sell on EBay with free delivery, but usually charge delivery if ordered direct! Why?? 
Kind regards,

Gareth.