When it is time to replace the battery in your 2GIG-CO3-345, 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 2GIG-CO3-345 carbon monoxide 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. Turn the sensor counter-clockwise to remove from baseplate.

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

3. Align the sensor over the baseplate, and turn clockwise while pressing against the baseplate to reinstall.

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.