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KamovInOnUp t1_iy5bgxn wrote

Reply to comment by Violet351 in There are 24 whole hours in the day and yet smoke detector batteries only die between 3am and 5am. by 1upin

They don't go off.

I'm pretty sure all new builds (at least in my area) are required to have either shared battery backups (battery + hardwire) or a 10-year sealed battery

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Violet351 t1_iy5jix5 wrote

My house is 130 years old but I had them put in when the electrics had to be replaced a few years ago

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