A method of displaying information on a display is provided. The method includes: receiving a request to display, on the display, information indicating whether each of a plurality of battery packs associated with the display, is mounted on a device of a plurality of devices associated with the display; in response to the request, displaying, on a monitor of the display, information indicating whether or not a battery pack of the plurality of battery packs associated with the display is mounted on each device of the plurality of devices associated with the display; receiving a selection of a battery pack from the plurality of battery packs displayed on the display; and in response to the selection of the battery pack, displaying information on the selected battery pack. Each of the plurality of battery packs is mountable on the plurality of devices.