When they detect smoke they begin to emit a loud warning alarm.
Kidde smoke alarm change battery.
Kidde produces the 1275 smoke alarm an ionization smoke detector that uses a small and harmless amount of a radioactive element to detect traces of smoke.
The general rule is to replace the battery twice a year.
If the smoke alarm is powered by battery it runs on either a disposable 9 volt battery or a non replaceable 10 year sealed lithium battery.
This video shows how to replace the backup battery in a kidde 4973 optical smoke alarm.
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If you own a battery operated smoke detector manufactured by kidde you need to replace the battery every six to 12 months.
When the battery is low the alarm begins chirping every 30 seconds to indicate a new battery is needed.
Sometimes the chirping may continue even after the battery is replaced.
Power source smoke alarms are powered by battery or by your home s electrical system.
Kidde recommends replacing the batteries in all of your alarms at least once a year or any time the unit indicates that the battery is low.
Pull the smoke detector out from the mounting plate that holds it on the ceiling or wall.
Step 1 twist the kidde smoke alarm cover counter clockwise so that the locking tabs are released.
Safelincs also offers replacement alarms for the kidde 4973 https w.