sentences:  The Elect'Road had a 150 km range using a nickel-cadmium battery pack and a 500 cc, 16 kW liquid-cooled gasoline "range-extender" engine.It powered two high voltage/high output/low volume alternators, each of which supplied up to 5.5 kW at 132V at 5000 rpm.The operating speed of the internal combustion engine (and therefore the output delivered by the generators) varied according to demand.