Samsung has unveiled an electric vehicle (EV) battery prototype designed to improve the driving range of next-generation cars as well as lessening the environmental impact of production. The company’s battery making arm, Samsung SDI, revealed the prototype design at the Detroit Auto Show this week. Samsung touts the high-density prototype EV battery as a means to increase the driving range of cars to 373 miles (600km) on a single charge, an improvement on many energy cells available today which can only go up to 500km. The electronics giant expects to begin commercial production of the batteries by 2020.