It takes about two or three replacement cycles before you recognize it as the tell-tale signs of smoke detector.
I had only one the first time I had to deal with it. But since these bullshit things beep once and then go silent, it takes forever to figure that out.
Me: sfalling asleep, enjoying the slow decline into unconsciousness
Smoke detector: beep
Me: What was that? Listens intently.
SM: silence
Me: Maybe be my imagination.
SM: silence
Me: Guess it's my imagination. Let's go to sleep again.
SM: beep
Me: No, that was real. What is that?
SM: silence
Me: Where did it come from?
SM: silence
Me: Oh, I guess it stopped. Weird.
SM: beep
Me: Or not. Still not sure where that came from.
This might repeat a few times, depending on how comfortable the bed is and how cold the house is.
SM: beep
Me: Fucking hell, this doesn't stop. Goddamnit. Guess I have to get up.
SM: silence
Me: Thoroughly annoyed and groggy from interrupted sleep.
SM: silence
Me: ...
SM: beep
Me: other side of the house
SM: silence
Me: boiling
SM: silence
Me: stopped?
SM: silence
Me: stopped.
SM: beep
Me: Goddamnit.
SM: silence
Me: Thoroughly ready to go to bed.
SM: silence
Me: ...
SM: beep
Me: starting to have a theory of where it comes from.
SM: silence
Me: beep, you motherfucker, I need to know it was you
SM: silence
Me: Is it taking longer to beep? It didn't stop now, did it?
SM: silence
Me: Come ON!
SM: beep
Me: Got it. Where's the ladder...?
Me: Gets the thing removed from the ceiling.
Me: Removes the battery, and throws the damn thing somewhere I may or may not see it in the morning.
Me: Sleep now.
SM: forgotten for weeks
Fuck those badly designed things. Bad UI kills.