Designers and engineers of the Fiat 500e worked to minimize drag while keeping the iconic styling of the conventional powered Fiat 500. For the 500e to achieve a 0.311 coefficient of drag (Cd), as compared to the 2013 Fiat 500 Lounge model's 0.359 Cd, eight exterior refinements were developed in the wind tunnel to enable the 48 count drag reduction. The result of hours of wind-tunnel testing allowed the 500e to achieve an additional five miles of range compared to its gasoline-powered sibling. Among these changes are front fascia sealing, aerodynamically optimized front fascia design, drag-reducing rear fascia design, liftgate-mounted aerodynamic spoiler, and under-vehicle belly pans. The battery adds for a total kerb weight of approximately , but it is located low in the chassis behind the front seats, changing the front:rear weight balance from 64:36 (on the conventionally gas-powered 500) to 57:43 (for the 500e).