The plug-in hybrid system of the PHEV version of the NX is equipped with a thermally efficient 2.5-liter in-line four-cylinder, a powerful lithium-ion battery, and front and rear engines. The lithium-ion battery has an impressive output of 18.1 kilowatt hours (kWh) and offers best-in-class range and performance for daily driving. At the push of a button, the driver can switch between four driving modes (EV mode, AUTO EV / HV mode, HV mode and self-charging mode) at will. In HV mode, the motor and motor work together to achieve high acceleration performance. When AUTO EV / HV mode is selected with a destination entered into the navigation system, Lexus' first predictive EV / HV mode will automatically switch to HV mode on freeways and other road conditions, based on data such as remaining battery power, route and traffic information to achieve energy efficient driving.