Lighting device for intelligently identifying the charge/discharge status of the battery pack

摘要

A lighting device having a removable battery pack is provided. The lighting device comprises a light body and a battery pack. The light body comprises a light-emitting unit and a first universal serial bus (USB) interface electrically coupled to the light-emitting unit. The battery pack comprises a power supply and a second universal serial bus (USB) interface electrically coupled to the power supply. The first USB interface comprises a first data transmission terminal configured for establishing data communication with the second USB interface and a first power terminal for supplying power to the light-emitting unit; the second USB interface comprises a second data transmission terminal for establishing data communication with the first USB interface and a second power terminal for supplying power to the first power terminal. The first data transmission terminal is grounded, and the second data transmission terminal is coupled to a switch circuit.