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Jul 17,  · Before heading to the smoke detector battery replacement steps, don’t forget to deactivate the mounting bracket lock of the alarm. Here are the steps to change the battery in smoke detector: 1. Remove The Smoke Alarm. It’s pretty evident that you first need to remove the fire or smoke alarm from the ceiling to change the fire alarm’s.

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First Alert BRK B Hardwired Photoelectric and Ionization Smoke Alarm with Battery Backup, Dual Sensing Smoke Alarm, 1-Pack X-Sense Wi-Fi Smoke Detector, Wireless Smart Fire Smoke Alarm with Replaceable Lithium Battery & Silence Button, Compatible with TuyaSmart & Smart Life App, Auto Self-Check Function, XSWT.