The nice thing about most canned and sealed food is that its health life goes far beyond its sell-by date. (Cans should be checked for corrosion and swelling periodically.) Unused batteries will last much longer than their sell-by date if kept in a freezer.
Funny. I just tested some food that passed the best if used by date. I looked up botulism and found it kills less 100 people per year.
I inspected the can, looked fine, opened it and ate it.
Except for how salty is was there was no problem, other than it tasted terrible because of the salt. LOL
in regards to batteries I have several LED flashlights as they last longer on a charge.
I also have about 100 chem lights and I don’t know how many candles.
a few wind up lights with radios as well.
I have had occasion to use them and my friend who had standard light quickly ran out of light and batteries.
I had plenty of batteries and a back up of rechargeables with a solar charge for charging little things like cell phones, GPS, batteries, etc.
I will be viable much longer than others and I have no interest in sharing as that would make me a target or put me in the position of being a leader over those who would not take my lead or command. to which I would say “you have to leave the island”.