How long will the battery last in my smoke alarm?

Actual battery service life depends on the particular design of your smoke or carbon monoxide alarm and the environment in which it is installed. All kinds of alarm batteries specified in the users manual are acceptable replacement batteries. Regardless of the manufacturer’s suggested battery life, you MUST replace the batteries immediately once the unit starts “chirping” (the “low battery warning”). It is recommended that you change the batteries in your alarms when you change your clocks for daylight saving time. Also consider replacing your current alarms with 10-Year Life alarms that never require a costly battery replacement for the ten year life of the alarm. This 10-Year series is available in smoke, carbon monoxideand combination