If your car's smart key dies on you, it's still possible to unlock your car and start the ignition without replacing the key's battery immediately.

The keyless car is a marvel of engineering. But how is it that they can start even when the battery in your key fob goes dead? The answer lies in science.

A car expert reveals how one can start their car with a dead key fob, even if their car has keyless ignition.

If you have a newer car, you may have a battery-powered smart key with a lot of really convenient features. But what do you do if that battery dies?