Why not? The battery lasts about 2 years, and the LCD numbers slowly (and very noticeably) get darker over a period of weeks before it dies, so you have plenty of notice.
unless it lasts more than 100 years it could reasonably fail within someone’s life. Nuclear energy is nice because it is more or less the only energy source that can do this.
exactly the worst time for it too fail. if it failed only when you treated it perfectly there would be almost no issue as you could just replace it. A good system should only ever rely on basic competence for things that instincts will remind the human to do (food and water) and not break down when the person is in a depression spiral.
I recommended a watch
Not a smart watch. A regular digital. They work great. Highly reliable. No login necessary.
Battery-powered is never reliable though.
Why not? The battery lasts about 2 years, and the LCD numbers slowly (and very noticeably) get darker over a period of weeks before it dies, so you have plenty of notice.
unless it lasts more than 100 years it could reasonably fail within someone’s life. Nuclear energy is nice because it is more or less the only energy source that can do this.
Again, you have plenty of notice to change the battery. So it’ll only fail if you fail.
exactly the worst time for it too fail. if it failed only when you treated it perfectly there would be almost no issue as you could just replace it. A good system should only ever rely on basic competence for things that instincts will remind the human to do (food and water) and not break down when the person is in a depression spiral.
There are watches that don’t require a battery. Some require you to rewind by hand, by turning the crown, others are powered by wrist movements.