FYI, I just had to replace the Bosch branded battery (part number 35-640B) in a car (2014 Mazda 2) belonging to a family member. I don't know when they bought the battery but I was rather surprised to find that it was dated Dec 2017. It was only fully warrantied for 3 years so it lasted longer (~ 5 1/2 years) than I would have expected. I believe that they bought the battery at Pep Boys, that's where they got most of their routine maintenance done.