A device with an electromotor (10) has a microcontroller (12) for influencing at least one motor function and a non-volatile storage element (14) for storing at least one variable as a specification for this motor function. The device also has an interface (13a) for a data line (13) for transmitting the at least one variable, especially a current limit value (Iref), from or to a storage element (14) with the help of the microcontroller (12) and optionally, via an internal data bus (15). The invention also relates to the use of the device in ventilator batteries and to programme-controlled current limitation for running up an electromotor (10).