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.

push-button ignitions aren't fault-free. Drawbacks include steep replacement costs of fobs, the inconvenience of fobs dying with no way to start the car — and even potentially fatal consequences ...

The Honda S2000 back in 1999 had a push-button start from the factory ... on the side of the road with a car that won't start. A branded system can cost between $400 and $1000, depending on ...

For cars with a push-button start, however, all you have to do is ... Your car uses a radio frequency identification system to know which remote key it should be opening for.