MOBILE DEVICE, BATTERY PACK, DISPLAY CONTROL METHOD, AND DISPLAY CONTROL PROGRAM

Provided is a mobile device driven by a secondary battery which can be charged and discharged. The mobile device detects a full charge of the secondary battery which is repeatedly charged and acquires and stores the capacity of the secondary battery upon the full charge. The mobile device causes a display device to display a change of the capacity upon the full charge of the secondary battery in time series so that a user can recognize the degradation state of the secondary battery.