NOVELTY - A power supply system for powering an electric motor in an electric vehicle, comprises a generator for converting a fuel to electricity; a metal-air converter electrically coupled to the electric motor and the generator for receiving electricity produced by the generator; and a fuel supply for supplying fuel to the generator.    USE - For powering an electric motor in an electric vehicle (V).    ADVANTAGE - The inventive system has a range comparable with that of traditional combustion engines without requiring frequent interruptive recharging from off-board source. It is economically feasible and can accommodate typical surge and range demands of a vehicle. By integrating the generator as an on-board recharging system for the metal-air converter powered electric vehicle, the range of the vehicle can be extended to over 300 miles. This is competitive with vehicles powered by traditional combustion engines and greatly improves the commercial viability of battery-powered electric vehicles. Improved system weight is also achieved by using a metal-air battery, which has much higher energy and power density by volume or weight than the traditional lead acid battery or other advanced batteries.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for:    (a) a method of charging a metal-air converter in an electrically-powered vehicle, comprising producing electricity using an on-board generator; and applying the electricity from the generator to the metal-air converter to convert a metal oxide produced by the metal-air converter to a metal fuel;    (b) a vehicle propulsion system for an electric vehicle, comprising an electric motor for driving a vehicle drive train (T) of the electric vehicle; a metal-air converter coupled to the motor for powering the motor; and a generator coupled to the metal-air converter for recharging the metal-air converter and for providing power to the motor, where the electric motor, the metal-air converter and the generator are interconnected;    (c) a method of propelling a vehicle, comprising converting a metal fuel to a metal oxide, where the converting step releases electrons to produce electricity; applying the electricity to an electric motor to a drive a motor vehicle drive train; and reconverting back a portion of the metal oxide to metal fuel by applying an electric charge from an on-board generator to the metal oxide; and    (d) an electrically-powered vehicle, comprising a motor for driving the vehicle; and a rechargeable battery with an on-board energy source for powering the motor.    DESCRIPTION OF DRAWING(S) - The figure is a schematic diagram of an electric vehicle.    Vehicle drive train (T)    Electric vehicle (V)