A method for determining the sufficient availability of energy content and power of a battery of an electric vehicle: wherein determining the sufficient availability of energy content comprises: - measuring the voltage (U sys) of the battery; - comparing the measured voltage (U sys) with a predetermined threshold voltage (U lim) and determining if the measured voltage (U sys) is equal or larger than the predetermined threshold voltage (U lim); wherein determining the sufficient availability of power comprises: - determining the internal resistance (R sys) of the battery; - comparing the determined internal resistance (R sys) with a predetermined threshold resistance (R lim) and determining if the determined internal resistance (R sys) is equal or less than the predetermined threshold resistance (R lim); determining that the energy content and the power of the battery of the electric vehicle are sufficient, if both the measured voltage (U sys) is equal or larger than the predetermined threshold voltage and the determined resistance (R sys) is equal or less than the predetermined threshold resistance (R lim); characterized in that, determining the sufficient availability of the energy content further comprises: - control the voltage (U sys), through a control unit of the vehicle, to be at a constant level during a control time period; - pause control of the voltage during a pause time interval (ΔT pause) following the control time period while controlling the battery current (I sys), through a current control unit of the vehicle, during the pause time interval (ΔT pause) to be below a zero level threshold current (I lim); and - measure the voltage (U sys) during the pause time interval by measuring the voltage (U sys) at a measuring time (t meas) being within the pause time interval (ΔT pause), wherein the measuring time (t meas) is equal to or longer than a relaxation time (T rel) of the voltage (U sys) with respect to the start of the pause time interval (ΔT pause). - measuring the voltage (U sys) of the battery; - comparing the measured voltage (U sys) with a predetermined threshold voltage (U lim) and determining if the measured voltage (U sys) is equal or larger than the predetermined threshold voltage (U lim); - determining the internal resistance (R sys) of the battery; - comparing the determined internal resistance (R sys) with a predetermined threshold resistance (R lim) and determining if the determined internal resistance (R sys) is equal or less than the predetermined threshold resistance (R lim); determining that the energy content and the power of the battery of the electric vehicle are sufficient, if both the measured voltage (U sys) is equal or larger than the predetermined threshold voltage and the determined resistance (R sys) is equal or less than the predetermined threshold resistance (R lim); - control the voltage (U sys), through a control unit of the vehicle, to be at a constant level during a control time period; - pause control of the voltage during a pause time interval (ΔT pause) following the control time period while controlling the battery current (I sys), through a current control unit of the vehicle, during the pause time interval (ΔT pause) to be below a zero level threshold current (I lim); and - measure the voltage (U sys) during the pause time interval by measuring the voltage (U sys) at a measuring time (t meas) being within the pause time interval (ΔT pause), wherein the measuring time (t meas) is equal to or longer than a relaxation time (T rel) of the voltage (U sys) with respect to the start of the pause time interval (ΔT pause).