AFS Trinity Power's Extreme Hybrid(TM) is based on a Flywheel Plug-in Hybrid Drive Train design that is composed of five primary subsystems: (1) energy storage in the form of advanced lithium batteries that are recharged at night with off-peak power from the power grid; (2) power storage in an advanced flywheel; (3) advanced power-conversion and electronics; (4) a high efficiency steady-state engine; and (5) an electric power train. AFS Trinity expects that a plug-in hybrid sedan incorporating the drive train will achieve fuel efficiency of 250 mpg and that a moderate size SUV utilizing the drive train will be capable of 200 mpg. The driver will be able to operate the vehicle in electric-only mode for 40 miles, and at any time may flip a switch to run the vehicle as a conventional hybrid with a 500-mile range. (Photo: Business Wire)