Our latest tests show that shopping for a car battery by brand name alone can be a big mistake, both in terms of performance and in cost. But our latest Ratings make it easy to find the best one for your needs and budget, no matter what you drive.
Big-name battery brands DieHard (Sears and Kmart), EverStart (Walmart), and Interstate all top our Ratings in some group sizes, but they are at or near the bottom in others. The greatest inconsistency comes from DieHard, which makes both the best and worst performers in two of six common sizes. Based on our findings, it is best to cast aside brand loyalty, and instead focus on CR's test results. (See which car batteries we recommend.)
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I work at Interstate Batteries and I can tell you this all they do is put different labels and stickers on batteries they are all the same battery. unless its a specialized battery directly from the manufacturer of the car dealer you are getting the same battery. it is a trade secret that nobody really want anybody to know. call Rick the owner at Interstate Batteries is a very Christian man hopefully he will not lie to you
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