The Interstate battery in my car came with the car and so far no problems but have only had the car 4 months and the weather has been mild-30's and above. The battery is a 49/h8 which is what Interstate shows for this vehicle.910 ca and 730cca - and not the calcium design-which may be lower than the comparable battery amps that others have mentioned but will see how the battery does this winter.It wont get much workout cause the car will sit in the garage once the snow and salt on the roads begins with only occasional startups til spring. Cary