How To Replace Fire Detector Battery. At this time you must remove the old battery and replace it with a fresh battery of similar brand. Many detectors will make use of a 9v battery.
Once you remove the cover of the detector its easy to see how to change a smoke alarm battery. Replace the battery cover and hold the smoke detector up against the mounting. Heres how to change the battery in your smoke detector.
The 9-volt battery will have two prongs that need to be pushed into place tightly while the AA types will face the same direction.
Heres how to change the battery in your smoke detector. Replace the battery cover and hold the smoke detector up against the mounting. I guess I never thought about it because the backup battery needed to be replaced once a year anyway. How to change a smoke detector battery.
