What does a Chevy Volt do when it runs out of gas and battery charge?

2013 Chevrolet Volt in Venice, California [photo: Chris Williams]Unlike conventional hybrids and many plug-in hybrids, the first-generation Chevrolet Volt makes extensive use of both electric and gasoline power. With a fully-charged battery pack, it will drive on electric power alone until the charge is depleted, at which point the onboard gasoline engine activates. The gasoline engine serves as a generator...