QS1135-840—Battery Replacement


When it is time to replace the battery in your door/window sensor, you will see an alert on your system panel

The QS1135-840 door/window sensor requires 2 CR2032 batteries, which can be purchased from Indiana Alarm, local hardware store, mass retailer, or battery store.

 

Step-by-Step Instructions:

1. Locate the sensor with a low battery on either your system panel.

2. Leaving the sensor on the door/window, open the cover by inserting a screwdriver in the slot at the top of the sensor.

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3. Remove the old batteries.

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4. Make sure the area where the batteries are stored is clean and there is no corrosion.

5. Place 2 new CR2032 batteries into the sensor, ensuring the writing is facing up.
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6. 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.

7. Check if the low battery status has cleared.