Patent ID: 8207705

Claim:
A charging apparatus comprising: a charging unit which charges a battery; a remaining capacity detecting unit which detects a remaining capacity of the battery; a necessary charging capacity obtaining unit which obtains charging capacity necessary for use after completion of the charging of the battery; an additional charging capacity calculating unit which calculates additional charging capacity for additional charging the battery based on the remaining capacity and the additional necessary charging capacity of the battery; a charging current determining unit which determines a charging current at the time when the charging unit charges for the additional charging capacity based on power consumption generated at the time of charging the additional charging capacity; a charging time calculating unit which calculates charging time required for charging for the additional charging capacity based on the determined charging current and the additional charging capacity; a charging time display unit which displays the calculated charging time; an input device with receives a user input of whether or not the calculated charging time is too long, acceptable, or shorter then necessary; and a control unit which lowers the determined charging current when the user input is that the calculated charging time is shorter than necessary and controls the charging unit based on the determined charging current.