Lightweight USB Rechargeable LED Camping Headlamp, COB Headlamp with Soft Patch, One-Touch Switch I. Instructions for using the switch 1) The battery has a positive pole facing inward (lamp head side) and a negative pole facing outward (tail side). 2. The switch is on the back, the Chengan switch function is switch function, lightly press the switch is dimming function. ll. Instructions for using lithium battery 1, lithium battery characteristics: the charging method of lithium battery and mobile phone battery is completely different; the lithium battery has no memory, it can be charged at any time, do not overcharge or discharge it. 2, the first charge lasts at least 6 hours, after the charger has turned on the green light, there is no need to overload. 3. special tips for using the charger anti-overload, anti-reverse connection, anti-short circuit "three anti"; 4. if the battery is not used for a long time, it should be fully charged and stored, and normally charged and discharged about once every three months; IV. Instructions for using the torch 1. When using the torch, the requirements of the torch for voltage and battery selection should be observed, and not used indiscriminately, to avoid burning the circuit board . 2. During use, when the brightness of the torch changes significantly, turn off the torch to avoid excessive battery discharge. 3. Heat dissipation techniques: During use, the torch must ensure heat dissipation. It is strongly recommended that when the battery is fully charged, you should use the second gear first, so that the torch head and battery can be used to extend the life of the product! The torch light should not be aimed at people's eyes, super bright and harsh, so as not to affect eyesight, especially children's eyesight. V. Troubleshooting 1) Check the battery: make sure the battery is charged and installed in the correct orientation, do not use batteries of different brands and do not mix old and new batteries. 2. check the base: ensure that the switch is tight and in good contact, that the copper column of the base is in good contact with the metal part of the pressure ring of the base, and ensure that the head of the lamp is not loose.