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How to Change the Battery in a First Alert Smoke and Carbon Monoxide Alarm

"Changing the battery in a First Alert smoke and carbon monoxide alarm requires removing the unit from its mounting bracket, sliding open the battery drawer or compartment, replacing the spent cells with fresh alkaline or lithium batteries observing correct polarity, and testing the unit. Proper maintenance ensures continuous life safety protection in residential and commercial spaces. Understanding Your First Alert Safety Device First Alert manufactures a wide range of dual-sensor and single-sensor safety alarms designed to protect occupants from invisible carbon monoxide (CO) gas and smoke particles originating from flaming or smoldering fir..."

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