In all my years, life, of living with, road tripping, autocrossing, tracking, working on, building and owning these cars, I have never wanted to take up vital trunk space with a battery, and when I do relocate them, I prefer to put them under the back seat… Lower center of gravity, weight more towards the center of the car, and best of all, still able to pack ALL the things in the trunk, including race tires for a customer’s ’68 911 vintage race car, or the vintage aluminum cooler from my parents. Heck, I even loaded up over seven four speed transmissions in one of my 1600s trunks to take to a friend in the Los Angeles area from the San Francisco Bay Area.
I am also of the opinion that there is no need to add to the rear structure of an ‘02 that isn’t raced, and the market is already saturated with rear battery/shock tower braces. Now that said, a well developed kit to install batteries under the back seat would be rather inspired and cool. I would buy one for sure!
P.S. These two photos were both taken at Laguna Seca at the Monterey Historics, 47 years apart, same car, same owners. I wasn’t to be born for three months when the first photo was taken.