A banknote processing machine comprising the following elements: a plurality of electromechanical parts to control a transport of banknotes along a transport path through the banknote processing machine; a plurality of sensors located along the transport path to capture features of banknotes transported along the transport path while passing by the sensors; software parts, including application software and a deposit data memory and configured to transport the banknotes along the transport path by the electromechanical parts and to generate deposit data according to banknotes having been transported along the transport path, and to store generated deposit data to the deposit data memory; an interface means to provide an interface between the banknote processing machine and an operator thereof or a network; a power control electronics to supply power delivered by a power source to the electromechanical parts, sensors, software parts and interface means; wherein the power control electronics comprises: a low voltage monitor to detect a lowering of a voltage of the power delivered by the power source below a minimum voltage and to provide a low power signal; a power failure control circuit to discontinue supply of power to a first group of said elements and to continue supply of power to a second group of said elements when said voltage falls below said minimum voltage; and a super capacitor which is assembled in the power control electronics such that, as long as the voltage delivered by the power source is above or not below the minimum voltage, the super capacitor is charged; and in the case that the voltage delivered by the power source is lowered below said minimum voltage, the super capacitor is isolated from the power source and discharged to ensure continuous power supply to the second group of elements, wherein, the first group of elements having high power consumption comprises one or several of the following: at least some or all of the electromechanical parts; at least some or all of the interface means; and at least some of the sensors not required in handling valuable data, the second group of elements comprises some or all of the sensors implied in handling valuable data, the deposit data memory and optionally the application software, and the power failure control circuit is constructed to continue to supply power to the sensors for a first holdup period, in particular from about 300 to about 1000 milliseconds, more particular for about 500 milliseconds; and to the deposit data memory for a second holdup period which is larger than the first holdup period, and which is in particular from about 4 to about 10 seconds, more particular from about 5 to about 6 seconds, from the time of the low power signal goes on. a plurality of electromechanical parts to control a transport of banknotes along a transport path through the banknote processing machine; a plurality of sensors located along the transport path to capture features of banknotes transported along the transport path while passing by the sensors; software parts, including application software and a deposit data memory and configured to transport the banknotes along the transport path by the electromechanical parts and to generate deposit data according to banknotes having been transported along the transport path, and to store generated deposit data to the deposit data memory; an interface means to provide an interface between the banknote processing machine and an operator thereof or a network; a power control electronics to supply power delivered by a power source to the electromechanical parts, sensors, software parts and interface means; a low voltage monitor to detect a lowering of a voltage of the power delivered by the power source below a minimum voltage and to provide a low power signal; a power failure control circuit to discontinue supply of power to a first group of said elements and to continue supply of power to a second group of said elements when said voltage falls below said minimum voltage; and a super capacitor which is assembled in the power control electronics such that, as long as the voltage delivered by the power source is above or not below the minimum voltage, the super capacitor is charged; and in the case that the voltage delivered by the power source is lowered below said minimum voltage, the super capacitor is isolated from the power source and discharged to ensure continuous power supply to the second group of elements, wherein, the first group of elements having high power consumption comprises one or several of the following: at least some or all of the electromechanical parts; at least some or all of the interface means; and at least some of the sensors not required in handling valuable data, the second group of elements comprises some or all of the sensors implied in handling valuable data, the deposit data memory and optionally the application software, and the power failure control circuit is constructed to continue to supply power to the sensors for a first holdup period, in particular from about 300 to about 1000 milliseconds, more particular for about 500 milliseconds; and to the deposit data memory for a second holdup period which is larger than the first holdup period, and which is in particular from about 4 to about 10 seconds, more particular from about 5 to about 6 seconds, from the time of the low power signal goes on.