How To Change My Fire Alarm Battery. Have your ID code replacement battery and know which zone has a low battery when you call to set your alarm to Test Mode. Mains powered smoke alarms may also make this low battery warning after periods of extended mains power outage.
Turn off the breaker controlling the alarm circuit or disconnect the smoke detector from the circuit. Have your ID code replacement battery and know which zone has a low battery when you call to set your alarm to Test Mode. Most alarm panels operate on 12-volts and use one of a few different sizes of sealed lead-acid battery.
Locate the alarms model number on the back of the unit.
Thats why you should always replace your smoke detector battery right after it emits a warning beep or chirp. Here are quick and easy steps to change a smoke detector correctly. The instructions are always printed on the alarm. Where you need to change the battery DFES recommends you do this on April 1st.
