I've run Odyssey batteries in my other cars, using the small size (7" x 6" x 3" or so), I think it's the PC625 or whatever. Very small and light - 14lbs usually. I have 2 CRXs and a 93 Prelude I run off those batteries. They work great, easily relocated to trunk/underseat area, and start the car fine. Those are all summer-only cars, so no winters but even still, I think they would be ok.