Make sure you panel is Disarmed before replacing the batteries on your Glass Break Sensor.
2GIG-GB1E-345 Glassbreak Detector
Twist counter-clockwise to remove from the base, then remove and replace 2 CR123A Lithium batteries
Honeywell 5853 Glassbreak Detector
Flip down the front cover, then remove and replace 2 CR123A Lithium batteries
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