Instructions for use of strong light flashlight one. Switch Instructions 1. The positive electrode of the battery is facing inward (the side of the lamp head), and the negative electrode is facing outward (the tail). 2. The switch is at the rear, the switch function Chengan switch is the switch function, and the light switch is the dimming function. two. Board Instructions 1. Our flashlight adopts advanced voltage stabilization and constant current technology, which can effectively solve the requirements of LED torches for voltage stabilization and constant current. 2. Special reminder: a. Do not use overvoltage, the voltage should not exceed 4.2V b. The positive root of the battery is facing forward, do not reverse, otherwise it will burn the board c. Pay attention to control the temperature change of the torch to ensure heat dissipation d. Non-professionals Do not open the circuit board three. Instructions for Lithium Batteries 1. Most of the flashlight batteries mainly use 18650 and 16340 lithium batteries. 2. Features of lithium battery: The charging method of lithium battery and mobile phone battery is completely different; lithium battery has no memory and can be charged at any time, do not overcharge or discharge. 3. The first charge is at least 6 hours, and then the green light of the charger is on. No need to overcharge. 4. The natural discharge rate of the lithium battery will release about 1% or less of its charge every day when it is not in use. Although it is slow, it should be prevented from being placed for too long. 5. Pay attention to the waterproof, anti-period, anti-drop, etc. of the battery. 6. Special reminder to use the three-proof charger with anti-overcharge, anti-reverse connection and anti-short circuit; 7. If the battery is not used for a long time, it should be fully charged and stored, and it should be charged and discharged once in about three months;