Part 2 of the different types of Smoke Alarms from the NFPA.

How are Smoke Alarms Powered?

There are many ways that smoke alarms can get their power.

Replaceable batteries –

Some smoke alarms will get all their power from batteries that are replaceable. They can be a 9v battery, AAA battery, AA battery, or another type of battery. These batteries should be replaced at least once a year, and the alarm tested every month.

10-year battery alarms –

Some smoke alarms come with a sealed, non-replaceable battery that can provide power to the smoke alarm for up to 10 years. This alarm does not require the batteries to be replaced, however, you should still be testing them monthly.

Hardwired with battery backup –

Some smoke alarms are provided with both primary power that is hardwired in from the home’s electrical system and a secondary battery backup. The secondary battery backup can be either a battery that needs to be replaced at least yearly, or it can be a 10-year sealed battery that does not need to be replaced.

How often do I need to replace my smoke alarms?

Smoke alarms must be replaced –

– Every 10 years based on the date of manufacture on the back label (7–10 years for combination CO/smoke alarm)
– If the alarm sounds an end-of-life signal (see back of alarm for description of signal)
– If the alarm fails a monthly test
– After a fire event

 

The author of this content cannot be liable for any use or misuse of the contents. This is a guideline and is meant for information only.

 

Smoke Alarm with 9 volt battery