TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Method: The step (S13) comprises (S13a) discharging electric energy from the battery with a pulse method, (S13b) discharging electrical energy from the battery with a decreased current strength compared to normal operation, (S13c) discharging electric energy from the battery with variable voltage, or (S13d) discharging electric energy from the battery with varying decreasing voltage. The method further comprises: (S11) preventing further delivery of electrical power from the battery depending on the response received in step (S8), when the exceptional operation is not preformed, which is decided by the decision unit, or when predetermined operational relationship compared to predetermined operational parameter values is not provided for the detected operational parameter data, in step (S5); (S8) detecting operational parameter data of the battery; (S9) transmitting the detected operational parameter data to the decision unit and/or to the control unit; (S10) determining and checking, whether a predetermined operational-relationship compared to predetermined operational parameter values is provided for the detected operational parameter data of the battery; (S13) performing exceptional operation of the battery, when the predetermined operational-relationship compared to predetermined operational parameter values is determined for the detected operational parameter data; (S14) detecting the exceptional operating parameter data of the battery; (S15) transmitting the exceptional operating parameter data to the control unit; (S16) determining and checking by the control unit, whether a predetermined relationship of the exceptional operating parameter data compared to the predetermined exceptional operating parameter value is provided for the battery; and (S17) preventing further delivery of electrical power from the battery, when the predetermined relationship is not provided in step (S16). The step (S10) further comprises: (S10a) determining and checking, whether the detected operational parameter data exhibits predetermined first operational parameter value, (S10b) determining and checking, whether the detected operational parameter data does not exhibits predetermined second operational parameter value, (S10c) determining and checking, whether the detected operational parameter data exceeds predetermined third operational parameter value, (S10d) determining and checking, whether the detected operational parameter data is less than predetermined fourth operational parameter value, or (S10e) determining and checking, whether the detected operational parameter data is within detected operational parameter value region for a predetermined fifth operational parameter value. The step (S8) and the step (9) are performed before the step (S7), and the step (S7) is performed at least partially depending on the transmitted operational parameters values. The step (S16) comprises: (S16a) determining and checking, whether the detected exceptional operating parameter data exhibits predetermined first exceptional operating parameter value, (S16b) determining and checking, whether the detected exceptional operating parameter data does not exhibits predetermined second exceptional operating parameter value, (S16c) determining and checking, whether the detected exceptional operating parameter data exceeds predetermined third exceptional operating parameter value, (S16d) determining and checking, whether the detected exceptional operating parameter data is less than predetermined fourth exceptional operating parameter value, or (S16e) determining and checking, whether the detected exceptional operating parameter data is within predetermined exceptional operating parameter value region for a predetermined fifth exceptional operating parameter value. The step (S4) comprises: (S4a) determining and checking, whether the detected operating parameter data exhibits predetermined first operating parameter value, (S4b) determining and checking, whether the detected operating parameter data does not exhibits predetermined second operating parameter value, (S4c) determining and checking, whether the detected operating parameter data exceeds predetermined third operating parameter value, (S4d) determining and checking, whether the detected operating parameter data is less than predetermined fourth operating parameter value, or (S4e) determining and checking, whether the detected operating parameter data is within predetermined operating parameter value region for a predetermined fifth operating parameter value. The method comprises allowing user of the motor vehicle an action opportunity and/or decision opportunity for step (S7), and/or allowing a provider of battery action opportunity and/or decision opportunity for step (S7). Preferred Components: The predetermined operating parameter values exhibit a battery voltage of 1.9-4.5 V, preferably 3.7 V. The electrochemical cells of the battery comprise at least one electrode, preferably at least one cathode that has lithium phosphate compound of formula (LiMPO4) (I), where M is at least one transition metal cation of the first row of the periodic table of elements, comprising manganese, iron, nickel and/or titanium, preferably iron. The compound exhibits an olivine structure. The predetermined operation conditions exhibit battery voltage of 2-3.65 V, for the batteries whose electrodes comprise lithium iron phosphate, and/or the predetermined operation conditions exhibit battery voltage of 2.5-4.2 V, for the batteries whose electrodes comprise lithium-cobalt-manganese-nickel. The predetermined exceptional operating parameter value exhibit battery voltage of 1.5-3 V, preferably 2.7 V, where the electrochemical cell comprises at least one electrode, preferably at least one cathode comprising lithium manganate, preferably spinel type, lithium cobaltate and/or lithium nickelate, or lithium mixed oxide comprising manganese, cobalt and nickel. The predetermined exceptional operating parameter value exhibits battery voltage of 1.8 V, for the batteries whose electrodes comprise lithium iron phosphate, and/or the predetermined exceptional operating parameter value exhibits battery voltage of 2 V, for the batteries whose electrodes comprise lithium-cobalt-manganese-nickel. EXAMPLE - No suitable example given.