My OEM battery has been struggling the last few days in the cold also. So, I need to revisit buying a new one. Optima batteries are interesting in that I can find a lot of real sketchy reviews out there, and a mix of good and bad reviews from owners on various forums. I'm not sure what I would choose at this point. How do etailers handle warranty claims? It might be another $60 to buy locally, but it might be worth it in the long (or short, per many reviews) run.
Anyone have any experience with these?:
http://www.odysseybattery.com/batteries.html
Or the Exide Orbital battery?