A vehicle having an electricity accumulator for driving a vehicle, a charging inlet for receiving power supplied from a power supply provided on the outside of the vehicle, a circuit for charging the electricity accumulator with power from the power supply, and power lines for connecting the charging inlet and the charging circuit. The device comprises, a machine operatively associated with a movable boom member rotatably attached. The computation of CRC values and optional checking against previously calculated CRC values is selected through the use of an address-mapping scheme. The synchronizer locates a record that corresponds to the selected web document. Thanks to the invention, the fuel cell is permanently maintained under fuel supply.