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, and, in response to the request, displaying, on a monitor of the display, information indicating whether or not each of the plurality of battery packs associated with the display is mounted on a device. Each of the plurality of battery packs is mountable on the plurality of devices.