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. Our store torch adopts advanced constant voltage and constant current technology, which can effectively solve the requirements of LED torch for constant voltage and constant current.
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 temperature change of torch 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 at least 6 hours to charge for the first time. In the future, it will be OK to turn on the green light according to the charger. It is not necessary to overcharge.
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 torch
1. When using torch, choose according to the requirements of torch for 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 torch changes significantly, turn off torch to prevent battery overdischarge.
3. Heat dissipation skills: Torch ensure heat dissipation during use. It is strongly required that when the battery is fully charged, it is better to use the second gear first, which can extend the product life of torch lamp holder and battery! Torch light 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 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, and pay attention to whether the lamp holder is loose.