[American Constitutionalist]

Just like products that are sold on Super Market selves... there is a expiration date on all those products..
Even if you bought some milk, eggs, bread a few days after the expiration date and don't seem to have gone bad are still edible.
They do that to CYA....

[KarlInOhio]

Batteries aren’t all the same. They figure out how far down the bell curve is safe. Do you pick a date where half the batteries would still be good as a replacement date? 90%? 99%? 99.99%?