CHARGE AND DISCHARGE TESTING DEVICE

A charge and discharge testing device capable of evaluating highly accurate charge and discharge characteristics for a high output type or a low output type secondary battery is provided. The present invention includes a bridge circuit including first and second switch elements connected in tandem at a first connection point, and third and fourth switch elements connected in tandem at a second connection point, and a control unit which when a mode signal indicates a first mode, controls the first to fourth switch elements so that the first and fourth switch elements and the second and third switch elements are alternately turned on and off, and when the mode signal indicates a second mode, controls the third switch element to be an off state and the fourth switch element to be an on state, and applies analog output control to vertically change a current made to flow due to an analog voltage in which a voltage greater than or equal to a gate threshold voltage changes up and down, to the first switch element during charge control and the second switch element in charging.