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 (CV) 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 (CV) 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 ). <EOS>