@matrix @matrix In my apartment the smoke detectors are wired into mains and have a Li-ion battery backup to keep them powered for at least a few weeks without power. That's the way to do it.

In my last apartment the smoke detectors didn't have carbon monoxide detectors so I put my own up. The batteries lasted for years but eventually it started chirping. It took me a little while to figure out what was causing the noise but when I did I replaced the batteries right then.

@sjw Yep, that's how it should be.
I remember though a video dissecting some mains connected detector and it had a huge vampire load.

@matrix @matrix interesting
Still, even if it's battery only, just change the batteries as soon as it starts chirping. It won't even take 3 minutes.
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@sjw
Well sometimes you don't have spare ones, but it's not like the batteries are hard to buy.

@matrix @sjw Mine started chirping and I couldn't figure out how to open it. Tard raged it with a hammer to make it be quiet.

@matrix @matrix The ones that use a 9v are a pain but most of the newer ones these days take 2 AA batteries.
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