Device and method for mobile terminal to supply power to external equipment

The invention discloses a device and a method for mobile terminals to supply power to external equipment. A power supply management module is arranged between an external power supply interface and a battery positive electrode of a mobile terminal; and after being enabled, the power supply management module adjusts the battery voltage and current of the mobile terminal so as to meet the requirements of the external equipment, and then supplies power to the external equipment through the external power supply interface. With the device and the method, the terminal can supply power to the external equipment so as to meet the current development trend of the mobile terminals.