Home Smoke detectors are all Beeping Batteries are not dead.???

[camerart]

And non-rechargeables last 5+ years

Hi N,
I checked my re-chargeable batts and they are 4 years old, let's see
C

 

[ahsrabrifat]

Smoke detectors generally expire after 8–10 years. Check the manufacture date printed on the back of each unit. If they’re 10+ years old, consider replacing them.

 

[be80be]

The yellow wire connects them all together so one beeps they all beep . Its very common to be powered from mains
and have backup power most places its code.

And the 0ne beep is low battery one somewhere is low maybe where inside heat unit or basement room lot of times you miss one like that

 

[gary350]

Manufacture date on all 5 smoke detectors is 10/02/2005. Last time detectors went off California & Canada were on fire we had a lot of smoke in our air.

Today 7/28/2025 all 5 detectors are beeping. It is 97° outside humidity 100% and rain every day. 5 detectors are wired together if 1 goes off all 5 go off. I determined 1 detector is causing all the trouble after removing it from the circuit the other 4 detectors work fine. Wife is trying to order new detectors that fit the existing twist lock case.

 

[GCook]

The house AC wiring being common to all of them, would make me check the AC voltage going to the detectors. If they are all on the same circuit breaker, AC voltage is even more suspect. If they are all on separate circuits, check the mains coming into the house. A problem with the power company's transformer can cause a low voltage problem in your house.

 

[gary350]

The house AC wiring being common to all of them, would make me check the AC voltage going to the detectors. If they are all on the same circuit breaker, AC voltage is even more suspect. If they are all on separate circuits, check the mains coming into the house. A problem with the power company's transformer can cause a low voltage problem in your house.

Smoke detectors are all AC with battery back up. With all 5 detectors laying on a table they are not connected to AC or each other, 4 detectors work excellent and the other 1 detector BEEPS none stop. The 4 good detectors are plugged into each room and they continue to work excellent while the 5th detector on the table continues to BEEP powered by a 9v battery.

 

[Nigel Goodwin]

Smoke detectors are all AC with battery back up. With all 5 detectors laying on a table they are not connected to AC or each other, 4 detectors work excellent and the other 1 detector BEEPS none stop. The 4 good detectors are plugged into each room and they continue to work excellent while the 5th detector on the table continues to BEEP powered by a 9v battery.

Why didn't you dump it 4 months ago?.

 

[ZipZapOuch]

Why didn't you dump it 4 months ago?.

Because it's a PITA to change all the detectors and their bezels/wiring harnesses. Hopefully Gary can find a modern detector that uses the same bezel/connector as his current pigtail.