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Why does the smoke alarm battery chirp always occur at 3am?

Posted on 5/13/25 at 9:51 am
Posted by Major Dutch Schaefer
Location: Classified
Member since Nov 2011
35462 posts
Posted on 5/13/25 at 9:51 am
How come these warning beeps never happen during the day. Always in the middle of the night. Rant Off.

For your viewing pleasure:







Posted by cgrand
HAMMOND
Member since Oct 2009
43282 posts
Posted on 5/13/25 at 9:58 am to
I’m sorry what was the question?
Posted by jfw3535
South of Bunkie
Member since Mar 2008
5214 posts
Posted on 5/13/25 at 2:10 pm to
Good fricking question. Our started chirping a couple weeks ago. Of course, it was 2 a.m. at the time.
Posted by AlxTgr
Kyre Banorg
Member since Oct 2003
84322 posts
Posted on 5/13/25 at 2:12 pm to
quote:

Why does the smoke alarm battery chirp always occur at 3am?
I thought you had to be black to know this?
Posted by junkfunky
Member since Jan 2011
35033 posts
Posted on 5/13/25 at 2:15 pm to
Ambient temperature.
Posted by LSUDad
Still on the move
Member since May 2004
60679 posts
Posted on 5/13/25 at 2:42 pm to
Average life of a Smoke Detector is around 10 years. I just changed out the ones in my sisters house.


Try to replace with the same model number. That way, you can leave the base on the ceiling, easy fix.

Also, buy the 4 or 6 pack. Cheaper than buying the singles.
Posted by Major Dutch Schaefer
Location: Classified
Member since Nov 2011
35462 posts
Posted on 5/13/25 at 2:46 pm to
quote:


Average life of a Smoke Detector is around 10 years. I just changed out the ones in my sisters house.


Try to replace with the same model number. That way, you can leave the base on the ceiling, easy fix.

Also, buy the 4 or 6 pack. Cheaper than buying the singles.


This^^^^^^^^^^. Followed all of this when I replaced them all a couple of years ago.
Posted by LSUDad
Still on the move
Member since May 2004
60679 posts
Posted on 5/13/25 at 2:50 pm to
quote:

This^^^^^^^^^^. Followed all of this when I replaced them all a couple of years ago.


I’m up in N. Ga. At my sisters house, done them 3 days ago.

As for batteries, Energizer’s, an I change them every year. Around Christmas.

Also I write with a marks-a-Lot on the A/C filter the date.

I keep a record on my phone for A/C and Water filter change outs.
Posted by NOLALGD
Member since May 2014
2530 posts
Posted on 5/13/25 at 3:31 pm to
I recently replace two connected, wired units in a rental with 2 non-connected 10 year internal battery units (that were close to the same cost as the wired units). The built -in, internal battery units are supposed to last 10 years without the need to replace back-up batteries yearly, however they aren't hardwired so the units are not connected to each other,

Its a rental and a small house (but with 12 ft ceilings), so the idea is I won't have climb on the ladder yearly to change the batteries. Will see how it works out.
Posted by junkfunky
Member since Jan 2011
35033 posts
Posted on 5/13/25 at 3:56 pm to
I'll admit I'm not very knowledgeable about electricity but I know for a fact temperature effects the flow of electrical current.
Posted by Croacka
Denham Springs
Member since Dec 2008
61449 posts
Posted on 5/14/25 at 12:01 pm to
Battery is slightly weaker at cooler temps.

Although the current needed to run a detector is miniscule, when the battery gets weak, a cooler house will cause the battery to become weaker, triggering the low battery alarm/chirp.

Posted by Wtodd
Tampa, FL
Member since Oct 2013
68154 posts
Posted on 5/14/25 at 1:50 pm to
quote:

Why does the smoke alarm battery chirp always occur at 3am?

Bc Chiner man is an a-hole. They program them to piss us off
Posted by baldona
Florida
Member since Feb 2016
22442 posts
Posted on 5/14/25 at 3:10 pm to
quote:


Battery is slightly weaker at cooler temps.

Although the current needed to run a detector is miniscule, when the battery gets weak, a cooler house will cause the battery to become weaker, triggering the low battery alarm/chirp.


This makes sense, but with HVAC systems why does it change that much? I can't imagine it would drop more than 2-3*?
Posted by fallguy_1978
Best States #50
Member since Feb 2018
51591 posts
Posted on 5/14/25 at 7:33 pm to
I always keep a few 9 volt batteries on hand for this reason alone. When I use the last one, I pop open the Amazon app and order a few more.
Posted by tigeroarz1
Winston-Salem, NC
Member since Oct 2013
3664 posts
Posted on 5/14/25 at 7:40 pm to
quote:

I thought you had to be black to know this?
During covid lockdown I worked from home along with my elementary school teacher wife. It’s true. I swear one family went two months with that thing chirping.
This post was edited on 5/14/25 at 7:41 pm
Posted by Spankum
Miss-sippi
Member since Jan 2007
58476 posts
Posted on 5/15/25 at 9:52 pm to
quote:

Why does the smoke alarm battery chirp always occur at 3am?



I have always thought this a very well conceived ploy to increase sales. If it starts chirping at 3 AM, I am very to take a broom handle and knock that bitch off the wall.
Posted by ChenierauTigre
Dreamland
Member since Dec 2007
34645 posts
Posted on 5/16/25 at 4:46 pm to
Obviously, it is the way of the universe. It is bizarre that it only seems to occur in the wee hours of the morning.

I have a parrot that mimics that beep perfectly. He treading on thin ice. Lol
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