The disclosure relates to a method for adaptively fast-charging a battery pack using a battery charging device. At least one voltage and the temperature of the battery pack are continuously or periodically detected by means of a detection unit. A charging current of the battery charging device is adapted by means of a control and/or regulating unit of the battery charging device on the basis of the detected voltage and/or the detected temperature of the battery pack. At least one battery-specific threshold of the voltage and/or the temperature is taken into consideration in order to adapt the charging current by means of the control and/or regulating unit. Prior to starting the charging process, the battery-specific threshold of the voltage and/or the temperature is transmitted from a memory unit of the battery pack and/or the battery charging device to the control and/or regulating unit by means of a communication unit.