How often should you check the batteries in smoke alarms?

Checking the batteries in smoke alarms monthly for testing and yearly for replacement or as recommended by the manufacturer is the best practice for ensuring they function properly. Regular testing is crucial because smoke alarms can fail to activate in the event of a fire if the batteries are weak or dead. Monthly checks help confirm that the alarm sounds when the test button is pressed, indicating that the unit is operational.

Additionally, many smoke alarm manufacturers advise replacing batteries at least once a year to ensure reliability. Following manufacturer recommendations is essential because different models may have varying requirements based on their design or battery type. This proactive approach helps maintain safety and ensures that smoke alarms will function effectively in an emergency.