The key fob is your lifeline to your car, letting you unlock the doors and set off the alarm, at a minimum, but how can you ...

Watch this video to see how to change the battery in your key fob. How to replace car key battery Most key fobs have a little slot you can use to pop them open with a small flatheaded screwdriver ...

How to change battery in Ford C-Max key? Press the narrow end of the key together at the grooved section, lifting the middle back panel up, which you can then lightly pry away using a flat-head ...

There’s usually a mechanical key hiding inside the key fob for cars with push-button start systems, so you can still unlock your door if the car battery or your fob battery runs out of juice.

How to Replace Your Car's Key Fob Consumer Reports looks at what you should know before heading out to find an expensive new key fob.