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Look for LiftMaster garage door openers with battery backup. Keeps the opener running when the power is down.
Secure View™ DC Battery Backup Belt Drive Wi-Fi® Garage Door Opener
DC Battery Backup Belt Drive LED Wi-Fi Garage Door Opener
DC Battery Backup Chain Drive Wi-Fi
DC Battery Backup Belt Drive Wi-Fi Garage Door Opener
8160WB DC Battery Backup Chain Drive Wi-Fi
DC Battery Backup Wall Mount Wi-Fi Garage Door Opener
Elite Series DC Battery Backup Chain Drive WiFi Garage Door Opener