The duracell batteries i bought are good for five and 10 years.
Smoke alarm battery replacement.
After 10 years smoke alarms expire.
When the battery requires replacement the alarm will sound with a short beep or chirp.
Replace the backup battery in a hard wire unit yearly whether it beeps or not.
Buy a new smoke detector or smoke alarm every 10 years.
I just spent 20 again on batteries for my smoke alarm.
Here s how to change the battery in your smoke detector.
Nearly every type of smoke detector makes a chirping sound to let you know when it s time to change the battery.
Inevitably that first chirp just happens to sound at about 3 am when you re deep asleep.
Mark the date you changed your battery on the inside of the smoke alarm.
Replace the battery cover and hold the smoke detector up against the mounting.
Most smoke detectors use 9v batteries.
To replace batteries in models with rear loading batteries.
The battery compartment should be visible on the back side of the detector remove the cover and replace the battery.
Be sure the battery is new so that it lasts the full ten year life expectancy of most home smoke detectors.
Is the old idea of replacing batteries every six months still relevant.
New battery in a smoke.
If your smoke detector is tied into your alarm system you might see if your alarm company has someone who can inspect and replace the smoke detectors that are failing.
At this time you must remove the old battery and replace it with a fresh battery of similar brand.
Expert advice on how to replace or change a smoke detector battery including a helpful diagram of a smoke detector s main parts.