Power torch large light Cup P50 long-range high-power LED outdoor handheld USB charging display,

1. Check the battery: make sure that the battery has electricity and the battery is installed in the correct direction. Batteries of different brands cannot be used. New and old batteries cannot be mixed.
2. Check tail hood: make sure that the switch is tightened and in good contact, ensure that the tail Hood copper cylinder is in good contact with the tail Hood pressure ring metal sheet, pay attention to whether the lamp holder is loose