Honeywell 5816—Battery Replacement
Summary: Learn how to replace the battery in your Honeywell 5816 door/window sensor and clear the low battery alert on your system. This guide provides step-by-step instructions, ensuring your sensor continues to function properly.
When it's time to replace the battery in your Honeywell 5816 door/window sensor, you’ll receive an alert on your system panel and a notification in the Brinks Home™ Mobile App.
The Honeywell 5816 sensor requires a CR123A 3-volt lithium battery, which can be purchased at most hardware stores, mass retailers, or online. You can order them here.
Step-by-Step Instructions
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Press the end latch to remove the sensor cover.
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Remove the old battery and replace it with a new CR123A 3-volt lithium battery.
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Reattach the cover by aligning the side opposite the latch first, then press the cover closed until the latch snaps into place.
- Verify if the low battery alert has cleared. If not, follow the steps provided here to manually clear the alert from your panel.
Troubleshooting and Tips
- Ensure the battery is inserted with the correct polarity (+ and - facing the right directions).
- Make sure the cover is securely attached to avoid tamper alerts.
- Dispose of the old battery responsibly according to local regulations.
- Keep a spare CR123A battery for future replacements.
If you require additional assistance, you can text a Support Representative any time at 469.513.8685.