Ford Key Fob Battery Replacement

How to replace the batteries in the key fob used on many Ford Explorer, Ford Edge, and Ford Fusion vehicles with pushbutton start and remote start. If you are getting "No Key Detected" or "Restart Now or Key is Needed" messages you might need to replace the batteries in the fob.
This key fob was used on many of the following years and models:
2015-2016 Ford Edge
2016-2017 Ford Explorer
2014-2017 Ford Fusion