At my workplace, we sell batteries. If a battery is on the shelf for longer than a certain period of time it is turned in as a core. My boss told me that a 6 volt was timed out so all I have to do is bring in an old core to take it's place. Blessings sometimes come when we least expect them.
I must have got one that was close to expiring. I got an unexpected discount at AUTOZONE on the price but wonder how long it will last.
Check the policy...I needed one and had to have it that day so I bought an aged one from PEP BOYS (the only group 1 they had) and only got a 5 buck discount, but, but, was ok with it as the warranty policy and time starts from the date of purchase there and not date of manufacture!
I know, PB is not everywhere, but worth checking out maybe....
Years ago Shucks auto parts offered a lifetime warranty on batteries if you paid an additional $20.00. They gave a special warranty card with your name and date on it. If the battery fails they give you a new replacement for free.
I have a model t friend that has gotten 3 new batteries for his t's. Every time he goes in for a new battery replacement they try to keep his lifetime card. It was getting a bit worn a few years ago so he laminated it.
I have a 1970 F-100 Ford that I bought new and when it came time for a battery, JC Penny's was doing automotive service and selling a lifetime battery. I still have the truck and I have not bought a battery in 40 plus years. Firestone has been replacing them and billing Penny's, I hope they both stay open.
The battery in my Suburban died with about 1 month left on the 4 year warranty. Took it back to Walmart and the gal give me a new one. I expected to pay a pro-rate but she said nothing and I walked out with a new one.