A battery charge control method includes a step of receiving input of a destination by a navigation device, and charging a battery by turning a switch ON at the time of departure of the vehicle, a step of turning the switch OFF during a first time derived based on the arrival schedule time transmitted from the navigation device, when the charging state of the battery is larger than a preset value,and a step of turning the switch ON again at the end of the first time, and charging the battery for a second time.