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You might want to look in to Interstate batteries. They have their own brand that are manufactured by the same company that makes the Optimas (which Interstate also sells) but with a longer warranty than the Optimas. I have driven diesels for many years and when I replace the OEM batteries I go to Interstate with the longest replacement warranty. Then I always go to them a month or two before the warranty runs out and have them test the battery. In the rare case one fails they put a new one in at no cost to me and then the warranty starts all over again. Just my $.02.
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