A mobile device, comprising: a battery; a wireless power receiver configured for receiving a wireless power signal from a power providing equipment; a communication transmitter; a charging module; and a processor electrically connected with the battery, the wireless power receiver, the communication transmitter, and the charging module, wherein the processor is configured for: controlling the charging module to charge the battery by utilizing the wireless power signal received from the power providing equipment under a condition that the power of the battery is not full; and controlling the communication transmitter to transmit a second end power transfer message to the power providing equipment under a condition that the battery is fully charged by the charging module, so that the power providing equipment stops providing the wireless power signal according to the second end power transfer message; characterized in that the processor is further configured for: controlling the communication transmitter to transmit a first end power transfer message to the power providing equipment under a condition that the power of the battery is full at a beginning of the wireless power receiver receiving the wireless power signal from the power providing equipment, so that the power providing equipment stops providing the wireless power signal according to the first end power transfer message; wherein the first end power transfer message and the second end power transfer message are different. a battery; a wireless power receiver configured for receiving a wireless power signal from a power providing equipment; a communication transmitter; a charging module; and a processor electrically connected with the battery, the wireless power receiver, the communication transmitter, and the charging module, wherein the processor is configured for: controlling the charging module to charge the battery by utilizing the wireless power signal received from the power providing equipment under a condition that the power of the battery is not full; and controlling the communication transmitter to transmit a second end power transfer message to the power providing equipment under a condition that the battery is fully charged by the charging module, so that the power providing equipment stops providing the wireless power signal according to the second end power transfer message; controlling the charging module to charge the battery by utilizing the wireless power signal received from the power providing equipment under a condition that the power of the battery is not full; and controlling the communication transmitter to transmit a second end power transfer message to the power providing equipment under a condition that the battery is fully charged by the charging module, so that the power providing equipment stops providing the wireless power signal according to the second end power transfer message; the processor is further configured for: controlling the communication transmitter to transmit a first end power transfer message to the power providing equipment under a condition that the power of the battery is full at a beginning of the wireless power receiver receiving the wireless power signal from the power providing equipment, so that the power providing equipment stops providing the wireless power signal according to the first end power transfer message; controlling the communication transmitter to transmit a first end power transfer message to the power providing equipment under a condition that the power of the battery is full at a beginning of the wireless power receiver receiving the wireless power signal from the power providing equipment, so that the power providing equipment stops providing the wireless power signal according to the first end power transfer message; wherein the first end power transfer message and the second end power transfer message are different.