For being such as small, cute and cuddly vehicle, the Chevy Spark EV sure does have a monstrous MPG rating!  In-fact, the little tyrant has officially earned the status of most efficient retail car with an estimated 82-mile range and 119 MPGe (a gasoline-equivalent figure). The US Environmental Protection Agency (EPA) estimates the Chevy Spark EV at a combined city / highway range of 82 miles on a full charge of its 21 kWh battery,  and has given the vehicle a rating of 119 MPGe  which tops out its competitors such as the Honda Fit EV. Check out the video below to see a little overview of how the battery works: