With push-button start systems, you can start your car effortlessly. As long as the key fob is inside the vehicle, a simple press of the button is all it takes.

For cars with a push-button start, however, all you have to do is physically put your dead-battery fob in a designated location, and the button will still work.

To start the engine, most cars with smart keys have a push button that fires up the engine before you even get in the car.