This info comes from about 40+ years ago when I was a teenager and worked part-time in my Dad's auto parts store. No paper records were kept on batteries, but purchase dates were stamped into the soft lead with a date stamp when the battery was sold establishing a sales date. I know that later batteries had punch out cards that the sales clerk was supposed to punch out the sales date. Either way, if it was a brand of battery we sold, and the battery failed a load test, very few questions were asked, and a pro-rated exchange was transacted. I would hope that that policy still holds.