How do you change the battery for 2011 Mazda 6 keyless?

To change the battery for a 2011 Mazda 6 keyless remote, first locate the small notch or groove on the side of the key fob. Use a flathead screwdriver or a similar tool to gently pry open the fob. Once open, remove the old battery, noting its orientation, and replace it with a new CR2025 battery. Finally, snap the key fob back together and test the remote to ensure it works properly.