According to one embodiment, a battery pack for connecting an external load via a switch is produced. The output-limiting resistor is used to limit an output current value. And the output-limiting resistor is configured to implement three different resistance values. The switching module is configured to switch a resistance value of the output-limiting resistor to one of the three different resistance values. The measurement module is configured to measure the output current value and a voltage value of the external load. And the control module is configured to perform control for connecting the external load to the battery pack via the switch (SW0) without the output-limiting resistor.