Garth S

My 'new' '08 base VR6 soon needs a new battery - hovers at 12.10V, so while it starts easily, the battery is <50% - time to go! ( alt puts out ~14.5V, so all is well).

The V6 calls for the H7/94 size case, the 'S' has the H8/49 case, and the TTS the H9 case - all differ only in length ~12.5":14":15.5" ..... with CCA ratings increasing with case size (length).

I wish to install the higher CCA battery reasonably available, especially as the price differential is at most a trivial $10 size to size .... so, do all trim variants share the same battery box? - or, will my V6 take the longer case, despite the H7 spec?

I would like to know this before flipping the seat back, as it may save me a trip to the supplier ( I can't imagine Porsche cutting the base box to 12.5" and thwarting my plan - but stranger things have happened).

Then there is the question of FLA vs AGM?

CAVU

I think your safe h7 h8 or h9

https://rennlist.com/forums/porsche-...ime-again.html

Garth S

Thanks for the link - better than any that turned up in my search. The part # cross refs in the video are good to have

CAVU

My factory battery, still going strong, is an AGM. When it is time to replace it, an AGM is going back in.

Sometime ago I compiled some info that you might find useful. If you want to add to it let me know and I'll update it for the forums future reference..