BonesOfTheMoonWhat did your parents refrigerate? Mine refrigerated bread.
Not my Patents but my grandparents, batteries.
I’m not sure if it’s still true with technical advancements (probably not), but it used to be that rechargeable batteries were put in the fridge, because they didn’t loose charge as much in cooler temperatures.
Many thinks old people do used to be useful but were made redundant with development over time.
Holds the charge longer but shrinks the max charge a bit, ends up being a wash.