According to one embodiment, a system includes a first device and a second device. The first device serves as an electric power supplying side. The second device serves as an electric power receiving side. The first device includes a transmitter that transmits status information to the second device. The status information indicates a state of an electric power source of the first device. The second device includes a receiver and a controller. The receiver receives the status information from the first device. The controller controls charging of a battery included in the second device using an electric power supplied from the first device, based on the state of the electric power source of the first device indicated by the status information.