This actually works. I keep mine in the freezer. Generally speaking, cold slows down any chemical reaction, including the polymerization that causes super glue curing.

Also, super glue polymerization requires water, so keeping it in a low humidity area (like a fridge or freezer: cold air holds less water) extends its shelf life further.

By far the best super glue extension method in my opinion is to just buy a bunch of single use sizes.

Batteries it depends on the chemistry.

NiCad/NiMH and some other older battery tech it can prolong shelflife, especially if you're in a hot/humid climate. Lithium batteries it doesn't really do anything.

Some soy sauce recommends refrigeration on the bottle. Some don't. I don't know why.

I like my ketchup refrigerated, not because it has to be, but because I like the contrast between cold ketchup and hot food.

Refrigerating bananas pretty much stops them ripening, so if you have some fully yellow bananas you can pop then in the fridge and it will stop them from over ripening for a few days. The peel will still go brown but the flesh remains as it was when you put them in. You definitely shouldn't put green bananas in the fridge, but with yellows it buys you some time.

If you use "natural" or "organic" peanut butter (read, ingredients: peanuts) you'll want to refrigerate it. It helps keep the oil from separating. It'll be the consistency of jiff or other sugared brands for most of the jar. I usually take mine out of the fridge when you get towards the bottom so it doesn't get too hard.

If it's the more natural kind it can go rancid if you don't eat it fairly quickly. If it's peanut butter flavored frosting like Jiff then it doesn't matter really