The Prius Plug-in's lithium-ion battery is lightweight and compact, weighing a total of just 330 lb. So you get useful EV power and driving range without the costs of an electric-only EV battery, while maintaining plenty of cargo space and seating for five. Also, charge time from a standard 120V household outlet is only 3 hours.
Built to last for the life of the vehicle, our lithium-ion batteries have undergone more than three years of coordinated field testing in Japan, North America and Europe, in a wide variety of climatic environments and driving conditions.
The Prius Plug-in's 4-cylinder engine is incredibly fuel-efficient. The first reason for this is its 1.8L displacement, which allows it to generate higher output and torque while operating at lower speeds. In addition to increased efficiency, you also get a much quieter ride.
Another factor is the elimination of the drive belt, along with an electric-driven water pump, which reduces supplemental engine load. This allows the engine to control the flow of coolant with increased precision based on vehicle conditions. The engine also features a Cool-EGR system to lower recirculated exhaust temperatures, as well as a recirculation system that reuses heat to help the Prius Plug-in warm up even quicker.