A control device, an electronic apparatus, a contactless power transmission system, and the like that can suppress deterioration in battery characteristics caused by recharging and realize power saving or the like. A control device on a power receiving side in a contactless power transmission system including a power transmitting device and a power receiving device includes: a charging unit that charges a battery based on power received by a power receiving unit that receives power from the power transmitting device; a discharging unit that performs an operation of discharging the battery and supplies the power from the battery to a power supply target; and a control unit that controls the discharging unit. The control unit starts the discharging operation of the discharging unit after an output voltage (VCC) of the power receiving unit has decreased and a start-up period (TST) of the discharging operation has elapsed.