Power supply circuit, power supply method and terminal

The present invention discloses a power supply circuit, a power supply method and a terminal to supply power to a first application unit and a second application unit. The power supply circuit comprises a power management unit and also comprises a first battery, a second battery and a charging unit which are connected to the power management unit. The power management unit is used for controlling the charging unit to charge the first battery and the second battery. The rated voltage of the first battery is higher than that of the second battery. The power management unit is also used for controlling the first battery to supply power to the first application unit and control the second battery to supply power to the second application unit. The working voltage of the first application unit is higher than that of the second application unit. According to the embodiment of the present invention, two batteries with different rated voltages are used to supply power to the application units, the battery with the higher rated voltage supplies power to the first application unit with the higher working voltage, the battery with the lower rated voltage supplies power to the second application unit with the lower working voltage, the power supply efficiency is improved, and the power consumption is reduced.