Last fall, I noticed that my original battery was cranking just a bit slower, so I ran over to Autozone to get it tested. It tested out at 79%, so I decided to get a new one, I figured 6+ years on the OEM was great and I'd rather not wait till it actually failed. The guys at this particular AZ are straight shooters and very knowledgeable, no kids work there. They talked me out of an Optima, and one of the reasons is as has already been said - they were getting a lot of them back. I walked out of there with a Duralast Gold - 3 year free replacement, 8 year prorated warranty - I think it's 880 CCA, for $100.