A device and a method for charging control, and an electronic device are provided. The device includes an interface module configured to be connected to an external charging device; a battery unit including a plurality of battery cells connected in series; a controller connected to the interface module, and configured to identify a charging mode of the external charging device and send a control instruction correspondingly according to the charging mode; a charging circuit connected to the controller and the battery unit and configured to receive the control instruction, so as to charge the battery unit according to a charging signal output by the external charging device; and a voltage dividing circuit connected in series with the battery unit, and configured to divide an output voltage of the battery unit to obtain a power supply voltage suitable for powering the electronic device.