Abstract: A battery control circuit includes a controller, a communication signal line, an operation switch, and a switch circuit. The controller is configured to control an operation state of the battery. The communication signal line is configured to connect the controller with the battery. The operation switch is connected to the communication signal line, and is configured to send a switch signal to the battery through the communication signal line. The switch circuit is connected between the operation switch and the communication signal line, and is configured to control the connection between the operation switch and the communication signal line. After the operation switch controls the battery to start to supply power to the controller, the switch circuit keeps the operation switch and the communication signal line disconnected to prevent the operation switch from transmitting a switch signal to the communication signal line.

Abstract: A charging method includes obtaining electrical parameter information of a charging circuit configured to charge one or more batteries, and controlling the charging circuit to selectively charge the one or more batteries and/or to charge an external device according to the electrical parameter information of the charging circuit.