Instructions for using a strong light flashlight one. Switch instructions 1. The battery's positive electrode faces inward (the side of the lamp head) and the negative electrode faces outward (the tail). 2. The switch is on the back, the Chengan switch function is the switch function, and the light switch is the dimming function. x model: 4led color two. Instructions for use of the circuit board Q: What is lithium battery over-discharge Answer: If the brightness is obviously weakened and you continue to use it, the battery will be damaged. Even if activated by a professional, the power will be greatly reduced. Therefore, please pay attention battery maintenance and charging. more often. Precautions for using bright flashlights Do not disassemble the lamp head frequently to avoid damaging the reflector or the bulb. Precautions for maintaining a high light flashlight When using, please perform routine maintenance on the flashlight so that it can continue to provide you with high-quality service. 1. Please wipe the flashlight with a clean soft cloth after each use. 2. When the flashlight is contaminated with seawater or corrosive liquid, please wash it with clean water in time and dry it with a hair dryer. 3. When the lamp head and tail cap are not screwed together smoothly, please apply a small amount of silicone grease to the interface. 4. When the flashlight is not in use, please remove the battery and store it in a cool place.