Honeywell 5816—Battery Replacement

When it is time to replace the battery in your Honeywell 5816 door/window sensor, you will see an alert on your system panel, as well as a notification in the Brinks Home™ Mobile App.

Follow the instructions below to replace your battery and clear the alert from your system. The Honeywell 5816 sensor requires a CR123A 3-volt lithium battery, which can be purchased at your local hardware, mass retailer, or battery store. You may also order these online here or at your preferred online retailer.

Step-by-Step Instructions:

1. Press the end latch to remove the cover.

001 HNYWLL 5816 Door Open

2. Remove and replace the CR123A 3-volt lithium battery.

002 5816 Remove replace battery

3. Return the cover to the sensor, starting with the side opposite the latch, pressing closed until the latch snaps into place.

003 5816 Door Close

4. Check if the low battery status has cleared or go to the following link for further instructions on clearing the error from the panel memory: GC2 GoControl - Silence Reset Alarm.