this post was submitted on 13 Jan 2024
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Yup. Not for phones, but maybe something that doesn't require much power, and would benefit from a very long battery life.
Maybe things like doorbells in situations where connecting them to mains electricity is too cumbersome a process.
Or fire alarms. I know of a couple of foolish people who, when the batteries died, they didn't bother putting new ones in.
There are lots of possibilities for this type of battery.