Abstract: A charger, a device to be charged, and a charging system are provided, the charger includes: a power interface and a first charging contact surface; wherein an input of the power interface is coupled with a power supply, an output of the power interface is coupled with the first charging contact surface; the output of the power interface comprises a power supply positive output and a ground output; and the first charging contact surface comprises a first closed loop and a second closed loop, wherein the first closed loop and the second closed loop are configured independently of each other, the first closed loop is coupled with the power supply positive output of the power interface, the second closed loop is coupled with the ground output of the power interface, and the first closed loop and the second closed loop are configured with bare conductive areas.

Abstract: Disclosed in the disclosure are a method and apparatus for controlling mobile terminal, and a mobile terminal. The method includes: detecting an operation that a user finger clicks a touch screen; in a case that the operation that the user finger clicks the touch screen in a preset time reaches to a preset time, controlling the touch screen to display a preset quantity of dynamic virtual keys in a preset area, the preset area being an area within a preset range taking a clicking position of the user finger as a center, and the dynamic virtual keys including basic dynamic virtual keys corresponding to functional operations of fixed virtual keys; and detecting and responding to an operation that the user finger clicks the dynamic virtual keys and executing functional operations corresponding to the dynamic virtual key.

Abstract: Disclosed in the disclosure are a method and apparatus for controlling mobile terminal, and a mobile terminal. The method includes: detecting an operation that a user finger clicks a touch screen; in a case that the operation that the user finger clicks the touch screen in a preset time reaches to a preset time, controlling the touch screen to display a preset quantity of dynamic virtual keys in a preset area, the preset area being an area within a preset range taking a clicking position of the user finger as a center, and the dynamic virtual keys including basic dynamic virtual keys corresponding to functional operations of fixed virtual keys; and detecting and responding to an operation that the user finger clicks the dynamic virtual keys and executing functional operations corresponding to the dynamic virtual key.