> For the complete documentation index, see [llms.txt](https://docs.didge.io/home/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.didge.io/home/foodcore-sensors/device-maintenance/replace-batteries.md).

# Replace Batteries

Sensor Battery Replacement Guide

This guide outlines the correct procedure for replacing the batteries in LoRaWAN sensors used in the MFC temperature monitoring system. Proper battery replacement ensures uninterrupted operation and optimal performance.

***

#### Battery Specification

* Battery Type: CR17450 3V Lithium Battery
* Note: Only use the specified CR17450 type to ensure compatibility and performance. Do not substitute with CR123A or other variants.

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***

#### Tools Required

* Phillips head screwdriver (small size)

***

#### Replacement Procedure

1. Locate the Sensor
   * Identify the sensor requiring battery replacement.
   * Check for signs of battery depletion (e.g., low voltage reading or communication loss).
2. Remove the Back Panel
   * Turn the sensor unit to expose the back.
   * Use a Phillips head screwdriver to unscrew the two rear panel screws.
   * Carefully lift and remove the back panel.
3. Replace the Battery
   * Remove the depleted CR17450 battery.
   * Insert a new CR17450 3V lithium battery into the battery holder, ensuring correct polarity.
4. Reboot the Sensor
   * Hold down the ACT button continuously.
   * Wait until the green LED light comes on and begins to flash.
   * Release the button after the flashing begins. The sensor is now rebooted and ready to resume normal operation.
5. Reattach the Back Panel
   * Carefully re-align the back panel and fasten the screws securely.

***

#### Disposal of Used Batteries

* Do not discard used batteries in regular waste.
* Place used CR17450 batteries in an approved battery recycling or disposal bin.
* Ensure batteries are handled in accordance with your local environmental safety guidelines.

***

#### Additional Tips

* Always verify the sensor reconnects and reports data after reboot.
* Record the date of replacement for future maintenance tracking.
* Store spare CR17450 batteries in a cool, dry place.

***

For further assistance or support, contact the MFC support team.


---

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