Chrisjharris

I need you guys opinion on the best battery for a a6. the last one i bought only lasted a year and a half.

NoVA_A6

Interstate and Craftsman are good brands. What brand did you purchase and what is the warranty on it?

VONBOTTLE

i got the biggest cranking AGM battery at O'reilly's (Super Start brand) for my S6, for the past two years (since i've owned it) extreme cold would either render the battery dead or very slow to start and if i left the car for a few days without driving, same issue (my daily commute is only a couple miles so that probably contributes to the issue).....anyway, the AGM battery has been great, starts up with authority now, no cold issues whatsoever

beep-beep

OEM at the dealer. It is about as much as any other battery. No questions about fit or compatibility with the car's battery computer (it has one).
The original one lasted me 11 years. With such longevity, I do not see a reason to go with something else.

you need to recode the computer after changing battery.

A6Gary

Fully agree. My original OEM AGM battery also lasted 11 years (was still at ~90% strength). But with getting a 15% discount from University Audi for being a Audi Club NA member, the actual cost to me was a wash with any decent aftermarket battery. And re-coding it with the battery management module was essentially a plug-n-play replacement.

beep-beep

Gary, wanted to ask, does it make sense to become "Audi Club NA member". What do I need to do and what are the benefits?
thanks

A6Gary

You just sign up and pay the membership annual fee or multiple year discounted fee. The benefits are the Quattro Quarterly magazine, discounts on parts and Audi new cars, attending social and driving events (local, regional, and, Europe), and information. Check it out here for further information: www.audiclubna.org