That's a good idea! I bet if someone were to develop a residential smoke detector that did that it would sell well. (Especially if it had other compelling features like a 10-year battery.)
If a fire alarm manufacturer saw how many upvotes the parent to this comment received, particularly considering how deep in the thread it’s buried, they’d most certainly develop one.
Good to know! We bought a few with integrated 10-year batteries from Home Depot a few years back, but I didn't realize you could get regular lithium 9Vs that last that long in a smoke detector now.
!! even the hard-wired ones are supposed to be replaced after 10 years, and new hard-wired ones will automatically brick themselves after the 10 years is up !!
For anyone reading this wondering how that's safe, I believe they make noise regularly once they reach this state, to encourage you to replace them, rather than just silently failing to operate!
