QS1431-840—Battery Replacement


When it is time to replace the battery in your glass break detector, you will see an alert on your system panel.

The QS1431-840 glassbreak detector requires 2 CR123A batteries, which can be purchased from Indiana Alarm, local hardware store, mass retailer, or battery store.

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Step-by-Step Instructions:
1. Locate the sensor with a low battery on either your system panel
2. Leaving the sensor in place, open the cover by pressing the tab at the top of the sensor.
4. Remove the old batteries.
5. Make sure the area where the batteries are stored is clean and there is no corrosion.
6. Place 2 new CR123A batteries into the sensor.
7. Put the cover back on starting with the opposite end from which it was opened. You should hear a snapping sound if it closes correctly.
8. Arm and disarm the system to clear the bypassed sensors.
9. Check if the low battery status has cleared