The Chevy Volt was a popular hybrid car from ... but it also highlights the need for fully electric vehicles since GM’s Volt fleet still used gas for an important 40% of its total mileage.

The Chevrolet Volt starts at around $33,000 and competes in the mid-sized sedan segment, but it's somewhat unique status as a plug-in hybrid sets the Volt apart from much of the market. With over 50 ...