How do I know if my smoke detector needs a new battery?
Press and hold the test button on the smoke detector. It can take a few seconds to begin, but a loud, ear-piercing siren should emanate from the smoke detector while the button is pressed. If the sound is weak or nonexistent, replace your batteries.
How long will a smoke detector chirp before it dies?
Usually, when a smoke alarm or carbon monoxide alarm is chirping (one quick little beep every 2 minutes or so), it means the battery is dying.
How often should batteries in smoke detectors be replaced?
Smoke alarm powered by a nine-volt battery
Test the alarm monthly. Replace the batteries at least once every year. Replace the entire smoke alarm every 10 years.
Will a smoke detector go off if the battery is low?
It is normal for smoke alarms to go off and sound briefly (up to 5-10 seconds) when you install a new battery or when they are powered up. If the alarm continues to go off and no smoke is present, the cause may be one of the following: There may be insufficient battery power, try new batteries.