Honeywell 5818MNL Recessed Door/Window Sensor Low Battery Replacement
Summary: This guide provides step-by-step instructions to replace the battery in your Honeywell 5818MNL Recessed Door/Window Sensor. A low battery alert may prevent your sensor from functioning properly, impacting the effectiveness of your Brinks Home™ security system.
Battery Type
The Honeywell 5818MNL sensor requires a CR2 3-volt lithium battery, which can be purchased from local hardware stores, mass retailers, or online stores.
Step-by-Step Instructions
- Locate the Sensor: Identify the recessed door/window sensor with the low battery alert on your Brinks Home™ panel or app.
- Remove the Sensor:
- Gently pry the sensor out of its recessed position using a flathead screwdriver or similar tool.
- Be careful not to damage the surrounding surface or the sensor housing.
- Access the Battery Compartment:
- Remove the sensor cover by sliding it off or unclipping it, depending on the model design.
- Replace the Battery:
- Remove the old CR2 battery from the compartment.
- Insert a new CR2 3-volt lithium battery, ensuring proper alignment with the positive (+) and negative (-) terminals.
- Reinstall the Sensor:
- Slide or clip the cover back onto the sensor securely.
- Place the sensor back into its recessed position, ensuring it fits snugly and is flush with the surface.
- Verify Functionality:
- Check your system panel or Brinks Home™ app to confirm the low battery notification has cleared.
- If the alert persists, double-check that the battery is properly installed and the sensor is seated correctly.
Further Assistance
If you experience difficulties during the battery replacement process, contact Brinks Home™ Support. Our team can guide you through troubleshooting steps or arrange a technician visit if necessary.