Those Sears Platinums are expensive at $179, but I'm paying $110 now for the spiral cell type batteries (optima/napa orbital) and they have the same 3-year life as a $60 Walmart battery. So basically I'm getting the worst value possible now.
Here are some things said about the Platinum that seem to apply to my situation:
The P-1 Platinum Automotive Battery from DieHard features 135 minutes of reserve capacity and 880 cold cranking amps. Its corrosion-resistant high quality tin-coated brass terminals provide reliable starting power in all weather conditions. Its rugged, military-grade construction features robust casing for increased compression and offers superior vibration resistance, making it ideal for off-road applications.
Longer off-season storage time - show cars & classic cars