A power supply charging system comprising: (a) a first power cell adapted to be at least partially charged when in a charging mode, to supply power when in a discharging mode; (b) a second power cell adapted to be at least partially charged when in a charging mode and to supply power when in a discharging mode, wherein when the first power cell is in the charging mode the second power cell is either in the discharging mode or a resting mode and when the second power cell is in the charging mode the first power cell is either in the discharging mode or a resting mode; (c) a motor driven generator (20, 28), the motor driven generator being adapted to operably switch between providing power to the first power cell during the charging mode of the first power cell and alternatingly providing power to the second power cell during the charging mode of the second power cell; (d) a third power cell adapted to operably supply power to the motor driven generator (20, 28); and (e) a control system which includes: (i) a power cell managing module adapted to alternate the motor driven generator (20, 28) to operably switch between providing power to the first power cell during the charging mode of the first power cell and providing power to the second power cell during the charging mode of the second power cell based on an occurrence of a pre-determined condition; and (ii) a charge control module adapted to detect the occurrence of a pre-determined power supply condition from at least one of the first power cell or the second power cell while in the charging mode or the resting mode and upon the occurrence of the pre-determined power supply condition to activate the motor driven generator (20, 28) to provide power to the first power cell while in the charging or resting mode or the second power cell while in the charging or resting mode; characterized in that the third power cell is in electrical communication with at least one of the first power cell or the second power cell in a manner so that when the first power cell or the second power cell is in the discharging mode, the first power cell or the second power cell supplies power to at least partially recharge the third power cell. (a) a first power cell adapted to be at least partially charged when in a charging mode, to supply power when in a discharging mode; (b) a second power cell adapted to be at least partially charged when in a charging mode and to supply power when in a discharging mode, wherein when the first power cell is in the charging mode the second power cell is either in the discharging mode or a resting mode and when the second power cell is in the charging mode the first power cell is either in the discharging mode or a resting mode; (c) a motor driven generator (20, 28), the motor driven generator being adapted to operably switch between providing power to the first power cell during the charging mode of the first power cell and alternatingly providing power to the second power cell during the charging mode of the second power cell; (d) a third power cell adapted to operably supply power to the motor driven generator (20, 28); and (e) a control system which includes: (i) a power cell managing module adapted to alternate the motor driven generator (20, 28) to operably switch between providing power to the first power cell during the charging mode of the first power cell and providing power to the second power cell during the charging mode of the second power cell based on an occurrence of a pre-determined condition; and (ii) a charge control module adapted to detect the occurrence of a pre-determined power supply condition from at least one of the first power cell or the second power cell while in the charging mode or the resting mode and upon the occurrence of the pre-determined power supply condition to activate the motor driven generator (20, 28) to provide power to the first power cell while in the charging or resting mode or the second power cell while in the charging or resting mode; characterized in that the third power cell is in electrical communication with at least one of the first power cell or the second power cell in a manner so that when the first power cell or the second power cell is in the discharging mode, the first power cell or the second power cell supplies power to at least partially recharge the third power cell. (i) a power cell managing module adapted to alternate the motor driven generator (20, 28) to operably switch between providing power to the first power cell during the charging mode of the first power cell and providing power to the second power cell during the charging mode of the second power cell based on an occurrence of a pre-determined condition; and (ii) a charge control module adapted to detect the occurrence of a pre-determined power supply condition from at least one of the first power cell or the second power cell while in the charging mode or the resting mode and upon the occurrence of the pre-determined power supply condition to activate the motor driven generator (20, 28) to provide power to the first power cell while in the charging or resting mode or the second power cell while in the charging or resting mode; characterized in that