Disclosed is an electronic device. An electronic device according to various embodiments comprises: a housing elongated between a first end portion and a second end portion; a resonant circuit having a coil placed inside the housing; a wireless communication circuit placed inside the housing; a rectifier for rectifying, to a direct-current power, an alternating-current power which is received via the resonant circuit; a battery which is charged by using the direct-current power; a switch for selectively connecting between the rectifier and the battery; a voltage detector which is set to detect the voltage value of the direct-current power and transmit, on the basis of the detected voltage value, a control signal for turning the switch on and off to the switch and the wireless communication circuit, wherein, when an interval of time between the control signals to be sequentially received from the voltage detector is the same or less than a predetermined value, the wireless communication circuit can be set to ignore at least one control signal to be received additionally after the sequentially received control signals. Other various embodiments can be provided.