The 2GIG-SMKT3-345 smoke detector requires 3 AAA batteries, 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. Twist sensor counter-clockwise to remove from base.

2. Remove and replace 3 AAA Alkaline batteries.

3. To clear low battery alerts from your panel, see the following article: How to Clear Alerts on the GC2.