Electric vehicle batteries could last twice as long, preventing costly replacement, with a new approach to heating and cooling the batteries, according to a study led by University of Michigan Engineering. The system is designed to work with voltage and charging data that today's battery management systems already collect, rather than requiring new sensors inside the battery. It is best suited for lower-power Level 1 and Level 2 charging, which is common at homes, workplaces and public parking areas, and is expected to cover most EV charging demand.