When it is time to replace the battery in your Honeywell 5800PIR-RES motion detector, you will see an alert on your system panel, as well as a notification in the In-alarm™ Mobile App.

Follow the instructions below to replace your battery and clear the alert from your system. The Honeywell 5800PIR-RES motion detector 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 bottom tab to remove the front cover.

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

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

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.