1. Instructions for Use of the switch
1. The battery is the positive pole facing inside (the side of the lamp holder), and the negative pole facing outside (the tail).
2. The switch is at the tail, the switch function bearing switch is the switch function, and the light switch is the dimming function.

II. Circuit board instructions
1. The constant voltage and constant current technology adopted by torch can effectively solve the requirement of constant voltage and constant current for LED torch.
2. Special tips: a. Do not use it over pressure, and the voltage should not exceed 4.2V B. The battery is facing forward, do not set it in reverse, otherwise it will burn plate c. Pay attention to controlling the change of flashlight temperature to ensure heat dissipation d. Do not open the circuit board for non-professionals.
3. Warranty description: no longer covered by warranty after opening or handling the circuit board.

III. Lithium battery instructions
1. Features of lithium battery: the charging method of lithium battery is completely different from that of mobile phone battery; Lithium battery has no memory, and can be charged at any time, and should not be overcharged or overdischarged.
2. It takes less than 6 hours to charge, and then it will be OK according to the green light of the charger. It is not necessary to charge.
3. Special tips: use a "three-proof" charger with anti-overcharge, anti-reverse connection, and anti-short circuit;
4. If you do not use the battery for a long time, you should fully store the battery and charge it once again in about three months normally.

IV. Instructions for Use of flashlight
1 torch, choose according to the requirements of the flashlight on voltage and battery. Do not use it indiscriminately to prevent the circuit board from being burnt out. Do not use batteries of different models and voltages at the same time.
2. In use, when the brightness of the flashlight changes significantly, turn off torch to prevent the battery from being over-discharged.
3. Heat dissipation skills: ensure heat dissipation during the use of the flashlight. When the battery is fully charged, it is strongly required to use the second gear first, so that the lamp holder and battery of the flashlight can prolong the service life of the product! Torch cannot be directed directly into people's eyes, which is super bright and dazzling, so as not to affect eyesight, especially children.

V. Troubleshooting
1. Check the battery: make sure that the battery has electricity and charge the battery in the correct direction. Different batteries cannot be used, and 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