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I think the battery I need is the AC Delco 75-7yr professional but I see a lot of guys going with the 78-7yr. What is the difference in the 75 vs 78 series, and what will work in my 2003?
Had an Optima, it always needed something...a blanket, a charge, occassionally warm milk...it was always needy. I now use a Delco 78 and never have to think about my battery being "in the mood" to start the car.