Powerful LED Flashlight 100000 Lumen Tactical Flashlights Rechargeable USB 18650 Waterproof Zoom Fishing Hunting LED Flashlight Description: Craftsmanship makes quality, unexpected portability, unexpected good looks Technology drives light, high power strong LED wick Eagle eye focus, telescopic focus, compact and portable High capacity lithium battery, high performance lithium battery provides longer lighting time High-powered wick: long range, high brightness, ultra-visible range Standard interface: USB interface, can be connected to laptop, computer host phone charging head, mobile power, etc. Multi-stage heat dissipation, intelligent heat dissipation system, strong heat dissipation to the long life of the core battery Waterproof, -piece waterproof housing, not afraid of rain, outdoor adventure encounter rainstorm is not afraid I. Instructions use of the switch: 1. The battery has the positive electrode facing inward (lamp holder side) and the negative electrode facing outward (tail). 2. The switch is at the tail, and the switch function: fully pressing the switch is the switch function, and lightly pressing the switch is the dimming function. II. Instructions for use of circuit board: 1. Our flashlight adopts advanced technology of constant voltage and constant current, which can effectively meet the requirements of LED flashlight for constant voltage and constant current. 2. Special tips: A. do not use it under overpressure, and the voltage should not exceed 4.2V B. The battery is facing forward, do not place it upside down, or it will burn the board. C. Pay attention to controlling the change of temperature to ensure heat dissipation. D. Non-professionals should not open the circuit board. III. Instructions for use of lithium battery: 1. Characteristics of lithium battery: the charging method of lithium battery is completely different from that of mobile phone battery; Lithium batteries have no memory and can be charged at any time. Don't overcharge or overcharge. 2. The first charging for 6 hours is the minimum. After that, it will be ok according to the green light of the charger. There is no need to overcharge. 3. Specially prompt to use the "three-proof" charger with anti-overcharge, anti-reverse connection and anti-short circuit; 4. If you don't use the battery for a long time, you should keep the battery fully charged, and charge and discharge it again in about three months. IV. Instructions for use of flashlight: 1. When using the flashlight, choose it according to the requirements of the flashlight on voltage and battery. Don't use it indiscriminately to avoid bur