I will likely be replacing my battery at some point this summer as it is almost 7 years old and it does not seem to be holding a charge more than a few days if the car isn't driven. When I was in Costco a couple of weeks ago, I noticed their Kirkland (Costco brand) batteries where about 1/2 the price of a Die Hard or other name brand battery. About $45 for the correct size for my S3. Battery was 650 CCA with a 3 yr full replacement warranty and 7 year limited warranty. That sounded like a pretty good deal. Anyone ever try one of these?