Smoke Alarm Types - Power Systems

12/20/2020 (Permalink)

The three main types of residential smoke alarms are as follows:

Conventional Batteries:

Units with replaceable batteries as their main power should have the batteries replaced when the alarm sounds or when the manufacturer specifies, whichever is sooner. It's a good practice to replace Alkaline batteries after one year, even if it's not required by the alarm manufacturer. (Lithium batteries will typically last much longer) These units (as with all smoke alarms) are required to have regular maintenance, including testing once a month.

Non-Replaceable Long Life Batteries:

These units have batteries that will last 10 years, and are ideal for people having difficulty changing batteries. Alarms powered from these batteries require regular testing and maintenance as well.  The smoke alarms themselves need replacing every 10 years. 

Hardwired Smoke Alarms:

Hardwired smoke alarm systems are powered by the home's AC electrical system, which also allows the alarms to be interconnected - so when one goes off, they all sound. Most hardwired alarms feature a backup battery, and should be tested at least once a month, and replacement should be left to qualified personnel.   

Low Battery Warning Feature:

All battery powered alarms have a low-battery warning that "chirps" when the battery power is low. Since the chirping only lasts a few days, it is recommended that if you are away for two days or more to test your alarms upon your return. Batteries should be replaced immediately upon hearing the chirping. 

SERVPRO of Ronkonkoma is here to help if you ever experience fire, smoke, or water damage. Please call us 24 hours a day, 7 days a week, 365 days a year at: 631-585-0007