Callisto on Nostr: I confess I didn't look into battery replacement when I replaced my watch last week. ...

I confess I didn't look into battery replacement when I replaced my watch last week. I take it, it makes monetary sense? Or can you get three or four years out of a watch battery, and in that case how??? I'll be replacing the battery in my iPhone 13 Mini soon, since nobody makes a phone smaller than a cybertruck these days.