Autonomous drive system

The system has a controller (8) for driving operation of an electric motor (9) e.g. brushless direct current motor, and a set of power type accumulators (5) e.g. lithium type accumulators or nickel-metal hydride type accumulators, for powering the motor. A base (3) receives a set of energy type accumulators (4) in a removable manner. A direct current converter (2) links the set of energy type accumulators to the set of power type accumulators. A central control unit (7) controls the direct current converter.