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im not biased but if i had a nickel for every 06-07 chevy coming in with a dead delco battery id be rich but ive learned that a lot of brands out there suck when it comes to lifespan
delco batteries actually suck compared to die hard or optima
i run odyssey in my battery killer vehicles
ive used optimas but those damned things go to **** preety quick too
i throw the delco maintainance free in the regular cars