Hey Walt, 850 CCa Never service battery, now located at a lot of places, Sam's and the like . 3 year full replacement. If the battery is charged good and the solenoid would hold up. You could crank the car off the road or driveway if you get stranded. The car likes plenty of current being available, it's kinda like carb's when your running, plenty of back up. I should know, I carry around plenty of back up. John http://www.specialtauto.com/