Testing and Changing Your Fire Alarm Battery
If your smoke alarms are powered by a nine-volt battery, the battery should be replaced every 6 months, while the alarm itself should be replaced once every 10 years. For 10-year lithium-powered fire detectors, you won't need to replace the battery.
Testing and Changing Your Smoke Alarm Batteries
If your detector is hardwired into your home's electrical system, replace the backup battery at least every 6 months and replace the smoke detector itself at least every 10 years.
As the battery in a smoke alarm gets weak, the smoke alarm will “chirp” about once a minute to let you know that the battery needs to be replaced. Note: Only the device with a low battery will chirp. The other interconnected alarms should be silent.
However, nowadays, it is more common to see two or three AA's in smoke detectors. AA batteries have about three times as much energy as a 9V. When using batteries like these, it's important that you check them consistently and replace your smoke alarm batteries every 6 months.
Your alarm manufacturer may have included a blinking red light to let you know it's time to test the alarm again. The Batteries are Low: Usually accompanied by a loud beep, a blinking red light could mean the batteries in the unit are low. Consider adding fresh batteries and running a test to make sure it's working.
Taking the battery out of a smoke alarm will not make it stop beeping. Even after the battery has died, the detector maintains a residual charge that will keep the chirp going for at least seven days.
For most residential smoke detectors, blinks are common; you need to be conversant with the colors showing. Different smoke alarms use the green and red LED to indicate the device's power status such that a flashing green means low battery while a constant blink means AC power is connected.
If you have changed the batteries and tried the circuit breaker, but the beeping persists, you may need to try resetting the detector(s): Use the reset button: most smoke detectors have a red reset button. Hold the reset button down for approximately 15-20 seconds.
The alarm may need to be replaced.
The smoke detector itself, and not its battery, might require replacement to stop smoke alarm warnings. Most manufacturers design their products to last for about 10 years. After a decade of service, some of the alarm's components may no longer function properly.
Battery smoke detectors run solely on batteries. Hardwired smoke detectors run on electricity, but they also have a backup battery for power outages. When you hear a hard-wired smoke detector beeping, it means you need to replace its battery.
When it comes down to the choice between Duracell and Energizer, there's no outright winner. Both brands use the best technologies and aren't significantly different in any other features. Whether you want to go with Duracell or Energizer is a matter of preference.
Once installed, though, hardwired smoke detectors are better than their battery-powered counterparts in every major aspect—safety, efficiency, maintenance and compliance with local codes.
This battery characteristic can cause a smoke alarm to enter the low battery chirp mode when air temperatures drop. Most homes are the coolest between 2 a.m. and 6 a.m. That's why the alarm may sound a low-battery chirp in the middle of the night, and then stop when the home warms up a few degrees.
In conclusion, the smoke detector may still be beeping even after the battery is changed because the battery may be low, the smoke detector may be faulty, or there may be dust or other particles in the smoke detector.
It's time to change the battery
Low batteries are the most common reason smoke detectors beep or send a trouble signal to your security panel, when there is no smoke or fire. As the battery weakens, the device will beep regularly to let you know it's time to replace it.
A solid green light on your smoke detector indicates that the device is on and operating normally.
What does it mean? This is the power indicator light: First Alert and BRK alarms have a power indicator light to show you that your alarm is receiving power. Some alarms have a red or green light that blinks every few minutes, while other models blink rapidly or shine a solid light.
The colors are green, yellow and red. These colors signify the urgency of the situation. Green is normal, yellow means to have caution, and red means to be alert and in a state of emergency. The LED will flash along with the alarm sound.
Most battery powered smoke detectors will beep for a minimum of 30 days before the battery dies. You'll know the battery is losing charge if you hear consistent beeping every 30 to 60 seconds.
The smoke alarm is desensitized by pushing the Test/Hush button on the smoke alarm cover. If the smoke is not too dense, the alarm will silence immediately and the red LED blinks every 10 seconds. This indicates that the alarm is in a temporarily desensitized condition.
Most hard-wired smoke detectors use a 9-volt battery that is supposed to kick in if your home loses electricity. When that battery is running low, your detector alerts you with a chirp that it's running low. Replacing the battery solves the problem.