What are the two main power sources for smoke alarms?

The two main power sources for smoke alarms are AC powered and battery powered. AC powered smoke alarms are directly connected to the electrical system of a building, providing continuous power as long as the electrical supply is stable. This reduces the need for regular maintenance of replacement batteries, but it does depend on the building's power being operational.

Battery powered smoke alarms offer the advantage of being independent from the building's electrical system, which is crucial during power outages. These devices typically have long-lasting batteries and many are designed to emit a warning sound when the battery is low.

Understanding both power sources is essential for effective smoke alarm installation and maintenance, ensuring that residential and commercial spaces have reliable fire detection systems. The alternatives provided, such as solar, gas, or wind power, are not standard power sources for smoke alarms, which ensures that AC and battery options are the focus of modern smoke alarm functionality.