Terminal and processing method

The invention discloses a terminal and a processing method, and the terminal comprises an input unit which is configured to receive a touch operation from a user; a display unit configured to displaya user interface; a processor coupled with the input unit and the display unit, the terminal further comprises a main battery, and an auxiliary battery is installed on the back face of the terminal. The processor is configured to determine to connect a charger; and when the charger charges the main battery, if the charging current of the main battery is reduced to be lower than the output currentof the charger, a charging path of a secondary battery is controlled to be opened, so that the charger charges the main battery and the secondary battery at the same time. In the invention, under thecondition that the charger is determined to be connected with the terminal, the main battery is preferentially charged, and under the condition that the charging current of the main battery is reducedto be lower than the output