2. Do not use over voltage, the voltage should not 4.2V, please do not reverse the battery, otherwise it will burn the circuit board;4. For batteries that are not used for a long time, the battery should be filled and kept, and then charged and discharged once every three months to avoid ;The instructions for useSize: 8.5CMx1.5CMx1.5CMSwitch: head switchFeatures: hang buckleYiwu E-Commerce is an online e-commerce platform for barely flashlights. It is mainly engaged in aluminum flashlights, headlights, bicycle lights, camping lights, fishing lights, diving lights, special jade flashlights, straw hat lights, high-grade flashlights, stainless steel. Flashlight, etc. Companies adhering to the "customer first, forge ahead" business , adhere to the "customer first" principle, with excellent quality, reasonable to provide quality services to our customers, welcome new and old customers to patronize!6. Do not the flashlight with sunlight, water, chemicals and corrosive gases for a long time to avoid damage to the flashlight;Gear position: 1st gear:Net weight: 40G4. When using the flashlight, check that the threads are not tightened, otherwise it may cause the light to be bright;5. The inner wall of the lamp cup is kept clean. Never wipe it with your hand or a hard object. Clear the fingerprint on the lens and wipe it gently with a cotton and lens cleaner.Insufficient should be replenished in time to avoid affecting battery life, and the battery should be charged during long-term storage.Battery: 1x14500/1xAA (not included)Material: aluminum alloyCharging method: noneModel: 14643. In use when the brightness of the flashlight changes significantly turn off the flashlight to the battery from being over-discharged and charged; attention to the battery's anti-drop etc. according to the charging speed of the charger when charging After the indicator light changes it in time do