Features: 1. 5000mah 26650 lithium ion battery. 2. Low internal resistance, large capacity and strong endurance. 3. Imported batteries core, can be recharged for 500 times. 4. Add protection board, with over-discharge, over-charge, over-current protection. 5. Suitable for laser pens, flashlights, cameras, model airplanes and other electronic products. Instruction: 1. Lithium battery charging temperature is 0℃ ~ 45℃. If the temperature is too low, it may not be able to charge. 2. The discharge temperature of the lithium battery is -20℃ ~ 60℃. Exceeding the temperature range will reduce the performance of the lithium battery 3. Properly use the lithium battery, do not short the battery and throw it into the fire. Do not punch, squeeze or disassemble the lithium battery. 4. Lithium battery should not be overcharged. Lithium battery over-discharge or over-charge will cause scrapping. Selecting a flashlight with low-voltage protection and a charger with anti-overcharge function can greatly improve battery life. 5. When not using the flashlight for a long time, remove the battery, fully charge the battery and keep it in a cool dry place, and charge it once every 3-4 months. Specifications: Battery: Lithium Battery Model: 26650 Voltage: 3.7V Capacity: 5000mAh Package List: 1 * Lithium Battery Note: Switch instructions 1. The battery is with the positive side facing inward (the side of the lamp head) and the negative side facing outward (tail). 2. The switch is at the end, press heavily for switch function, press lightly for dimming function. Board instructions 1. Our flashlight adopts advanced steady-state constant current technology, which can effectively solve the requirements of LED flashlight for constant voltage regulation. 2. Special tips: a. Do not use over voltage, the voltage should not exceed 4.2V. b. The battery is facing forward, do not reverse, otherwise it will burn. c. Pay attention to control the temperature change of the flashlight to ensure heat dissipation. d. Non-professionals should not open the circuit board. 3. Warranty Note: Opening or handling the board is no longer covered by the warranty. Lithium battery instructions 1. Characteristics of lithium battery: The charging method of lithium battery and mobile phone battery is completely different; lithium battery has no memory, can be charged at any time, do not overcharge and over discharge. 2. Charge for at least 6 hours for the first time. After that, the green light of the charger will be on, and it's done. 3. Special tips are to use a "three-proof" charger with anti-overcharge, anti-reverse, and short-circuit proof. 4. If the battery is not used for a long time, the battery should be fully charged and recharged and discharged normally once every three months. Flashlight instructions 1. When the flashlight is in use, select according to the voltage and battery requirements of the flashlight. 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. When using, turn off the flashlight when the brightness of the flashlight changes significantly to prevent the battery from being over-discharged. 3. Heat dissipation technology: During the use of the flashlight, heat dissipation must be ensured. When the battery is strongly required to be fully charged, it is best to use the second gear first, so that the lamp holder and battery of the flashlight can be extended! Can not shine the light from the flashlight into the human eye. It is too bright and glaring and will hurt eye vision, especially children. Troubleshooting 1. Check the battery: Make sure the battery is charged and install the battery in the correct direction. Do not use batteries of different brands. Old and new batteries should not be mixed. 2. Check the tail cover: Make sure that the switch is tight and in good contact, and ensure that the copper cap of the tail cover is in good contact with the metal plate of the tail cap. Pay attention to whether the lamp cap is loose. 3. Insufficient power battery should be replenished in time to avoid affecting battery life. The battery should also be charged during long-term storage. 1、5000mah 26650 lithium ion battery. 2、Low internal resistance, large capacity and strong endurance. 3、Imported batteries core, can be recharged for 500 times. 4、Add protection board, with over-discharge, over-charge, over-current protection. 5、Suitable for laser pens, flashlights, cameras, model airplanes and other electronic products.