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Do we need original receipt when we bring back in the Costco battery to warranty replacement? Or can they just replace new one when you bring in the battery as is?
Do they test to make sure it's like "dead/weak"? Some days car may have harder time to start due to say "colder temperatures being in the outside than compared to a warm hot day". Our perception of weak battery versus what actual voltage may vary. Don't want to waste time/trip to bring it in and they says voltage shows it's healthy and won't offer replacement.
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