Oldest Working AA Battery?

[Sylvain Cote]

Wow!
I have not seen that Eveready battery color in a long time.
From Quora

Quote:Eveready batteries, unless they are marked “alkaline,” are carbon-zinc piles. You can use one to exhaustion, and then switch it off. After about a day the depolarization process will restore the battery to full strength. Hence, “nine lives.” Eventually the depolarizer will be used up, rendering the battery drained for the last time.