How To Put A Battery In Smoke Detector. Locate the alarms model number on the back of the unit. 3 Close the cover or replace the body.
I guess I never thought about it because the backup battery needed to be replaced once a year anyway. Be sure the male and female terminals are properly oriented and connect soundly with the base. Once you remove the cover of the detector its easy to see how to change a smoke alarm battery.
Learn how to replace the 9-volt battery in a smoke or CO alarm.
The battery compartment should be visible on the back side of the detector remove the cover and replace the battery. Opens in a new window Opens an external website Opens an external website in a new window. I didnt realize until I went to put the unit up that the existing smoke detectors are hardwired. Check that the negative and positive connections are matching the labels on the smoke detector.
