(US5848380-A)      The method involves collecting predetermined number of current value flowing through a load and the voltage values across a battery when the load is driven. An approximate straight line function is obtained by plotting the collected current/voltage value with respect to the current/voltage axis. A predefined positive reference value is inserted in the current axis corresponding to the straight line function and a first voltage is obtained in the voltage axis.    Then the obtained voltage is judged, whether it corresponds to the predefined discharge termination voltage. A predefined negative reference value is inserted in the current axis corresponding to the straight line function, a second voltage is obtained. Then the second voltage is displayed in a display unit (17) as the desired discharge termination voltage of the battery which is then connected to the load.    ADVANTAGE -   Enables to obtain desired discharge termination voltage easily. Enables to check discharged termination of battery even after being mounted on vehicle.    (JP3079030-B2)      The method involves collecting predetermined number of current value flowing through a load and the voltage values across a battery when the load is driven. An approximate straight line function is obtained by plotting the collected current/voltage value with respect to the current/voltage axis. A predefined positive reference value is inserted in the current axis corresponding to the straight line function and a first voltage is obtained in the voltage axis.    Then the obtained voltage is judged, whether it corresponds to the predefined discharge termination voltage. A predefined negative reference value is inserted in the current axis corresponding to the straight line function, a second voltage is obtained. Then the second voltage is displayed in a display unit (17) as the desired discharge termination voltage of the battery which is then connected to the load.    ADVANTAGE -   Enables to obtain desired discharge termination voltage easily. Enables to check discharged termination of battery even after being mounted on vehicle.