CONTROL CIRCUIT COMPATIBLE WITH BATTERY POWER SUPPLY AND EXTERNAL POWER SUPPLY

A control circuit compatible with battery power supply and external power supply. A first end of a switch module is connected to a power connector module, a second end thereof is connected to a second end of a switch control module, and a third end thereof is connected to an external power supply connector module; the switch module is used for disconnecting a power supply circuit between the battery connector module and the power supply output end when receiving a first control signal, and for connecting the power supply circuit when receiving a second control signal; the switch control module is used for outputting the first or second control signal based on whether an external power supply signal is received; the battery connector module is adapted to be connected to a battery; and the external power supply connector module is adapted to be connected to an external power supply.