NOVELTY - The system has a rectifier stage (8) comprising a set of switches and connected between a multi-phase or single phase power supply network (1a) or another multi-phase or single phase power supply network (1b) and a battery (4) of a car. The rectifier stage is arranged in parallel with a filtering stage (2) and a portion of another rectifier stage (3). A capacity of a capacitor (7) is lower than that of capacitors (21-23) of the filtering stage. The capacitor is connected between two phases (11, 13) or between one of the phases and a neutral (14) of the latter multi-phase power supply network.    USE - Charging system for connecting to a multi-phase or single phase power supply network for charging a battery i.e. traction battery, of a car i.e. electric car.    ADVANTAGE - The rectifier stage is arranged in parallel with the filtering stage and the portion of the other rectifier stage, and the capacitor is connected between the two phases or between one of the phases and the neutral of the multi-phase power supply network, where a capacity of the capacitor is lower than that of the capacitors of the filtering stage, thus ensuring better compatibility for different types of the power supply network while increasing energy efficiency of the system. The system is designed such that a filtering capacity of the system is reduced, and a reactive current of the system is decreased, thus increasing a power-factor of the system.    DETAILED DESCRIPTION - The switches are designed as MOSFETs or insulated gate bipolar transistors (IGBTs).    DESCRIPTION OF DRAWING(S) - The drawing shows a circuit diagram of a charging system for charging a battery of a car.    Multi-phase or single phase power supply networks (1a, 1b)    Filtering stage (2)    Rectifier stages (3, 8)    Battery (4)    Capacitor (7)    Phases of one of multi-phase or single phase power supply networks (11, 13)    Neutral of one of multi-phase or single phase power supply networks (14)    Capacitors (21-23)