Keychain Strong Light Type-C Charging Multifunctional Red Blue White Light COB Handlight Ultra Bright Aluminum Alloy Outdoor Handlight instructions: 1. Check the battery: Ensure that the battery is charged and installed in the correct direction as a flashlight; When using a flashlight, choose according to the voltage and battery requirements of the flashlight. Do not use it randomly to prevent burning out the circuit board. Do not use batteries of different models and voltages at the same time; During use, when there is a significant change in the brightness of the flashlight, it should be turned off to prevent excessive battery discharge and charged in a timely manner; Pay attention to the waterproof, moisture-proof, and anti drop properties of the battery. When charging, follow the charging speed of the charger and remove it promptly after the indicator light changes, without overcharging; 4. For batteries that have not been used for a long time, they should be fully charged and maintained. Normally, they should be charged and discharged again after about three months to avoid chemical corrosion; 5. The inner wall of the lamp cup should be kept clean and should not be wiped with hands or hard objects. If fingerprints on the lens are clear, a cotton swab dipped in lens cleaner can be used to gently wipe it; 6. Do not expose the flashlight to sunlight, water, chemicals, corrosive gases, etc. for a long time to avoid damaging the flashlight; 7. Non professionals are not allowed to disassemble the flashlight to prevent damage to the circuit board. 3、 Attention: 1. Do not directly shine light on the eyes to avoid causing harm to them; 2. Do not use under excessive voltage, the voltage should not exceed 4.2V, and the battery should not be reversed, otherwise it will burn out the circuit board; 3. When charging, please identify the positive and negative poles of the charger and do not overcharge or discharge the battery to avoid damaging its service life (charging time is generally 5-8 hours) 4. When using the flashlight, check that all threads are tightened without looseness, otherwise it may cause the goods to not light up slightly; 5. Flashlights should be avoided from being placed in sunlight or high temperature environments. After stopping use, please remove the battery and fully charge it before storing it in a cool and dry place; 6. The company flashlight has waterproof ability for daily use and generally does not have problems in rain, but it does not have diving function. Please do not carry this flashlight for diving or keep it in a basin or bathtub for a long time; To maintain smooth rotation of the O-ring (sealing rubber ring) and threads, please wipe the surface with Vaseline oil 2-3 times a year. 4、 Charging instructions: Shortcomings should be promptly replenished to avoid affecting battery life, and the battery should also be charged during long-term storage.