A method of identifying a battery provided with a wireless battery control device during a battery charging procedure comprising the following steps: connecting the battery to a battery charger; the battery charger supplying a first current to the battery; the wireless battery control device measuring parameters relating to the first current; the battery charger generating and sending a first wireless interrogation signal, the wireless interrogation signal including information relating to parameters of the first current; a wireless battery control device receiving the first interrogation signal compares the information relating to the parameters of the current being received by the associated battery to the information relating to the parameters of the first current that was supplied by the battery charger, and the wireless battery control device sending back a first wireless response signal should the information relating to the parameters match, the battery charger forming a link with any wireless battery control device that emits a first wireless response signal, the battery charger supplying a second current, the second current with parameters different to the parameters of the first current; characterised by further comprising the following steps: the battery charger sending out a second wireless interrogation signal, the wireless interrogation signal including information relating to parameters of the second current; a wireless battery control device receiving the second interrogation signal compares the information relating to the parameters of the current being received by the associated battery to the information relating to the parameters of the second current that was supplied by the battery charger, and the wireless battery control device sending back a second wireless response signal should the information relating to the parameters match, wherein the second interrogation signal is configured to cause a second wireless response signal to be sent only by wireless battery control devices linked with the control unit. connecting the battery to a battery charger; the battery charger supplying a first current to the battery; the wireless battery control device measuring parameters relating to the first current; the battery charger generating and sending a first wireless interrogation signal, the wireless interrogation signal including information relating to parameters of the first current; a wireless battery control device receiving the first interrogation signal compares the information relating to the parameters of the current being received by the associated battery to the information relating to the parameters of the first current that was supplied by the battery charger, and the wireless battery control device sending back a first wireless response signal should the information relating to the parameters match, the battery charger forming a link with any wireless battery control device that emits a first wireless response signal, the battery charger supplying a second current, the second current with parameters different to the parameters of the first current; characterised by further comprising the following steps: the battery charger sending out a second wireless interrogation signal, the wireless interrogation signal including information relating to parameters of the second current; a wireless battery control device receiving the second interrogation signal compares the information relating to the parameters of the current being received by the associated battery to the information relating to the parameters of the second current that was supplied by the battery charger, and the wireless battery control device sending back a second wireless response signal should the information relating to the parameters match,