Changing a key fob battery is a simple task that can be done in a few minutes. A key fob is a small device that allows you to lock and unlock your car doors and trunk without using a key. It typically has a button or two on it, and it communicates with your car’s computer using a radio frequency signal.
Most key fobs use a small coin cell battery, which can be purchased at most hardware stores or online. To change the battery, you will need a small screwdriver or a coin.