2PCS 3.7V 18650 Lithium Battery 3800mAh With PCB Protection Board For Flashlight Bluetooth Speaker Hair Clipper LED Light Toy Car

3.7V 18650 3800mah Lithium Battery for Flashlight Bluetooth speaker Hair Clipper Led Light Toy Car + PCB Protection Board Product Description: Rated Capacity: 3800mAh Voltage: 3.7V PLUG: XH2.54 The battery pack is widely used in headlamps, miner's lamps, flashlights, searchlights, loudspeakers, wireless monitoring equipment, medical equipment, instrumentation, traffic signals, and small portable household appliances. Common sense when using lithium electricity: 1. Use a standard 4.2V lithium-ion battery charger. 2. High discharge currents are prohibited. 3. Discharging is prohibited; the battery voltage should not be lower than 2.5V. 4. Disassembling or short-circuiting batteries is strictly prohibited, as this may cause a fire. Advantages of using lithium electricity: 1. Small volume, light weight, large capacity, environmental protection, and no memory effect. 2. It is the power source for portable electronic devices, but the more delicate lithium-ion batteries used are, please note the following points. Notes: 1. Do not allow reverse charging; the battery must have precise, non-reverse polarity connections. 2. Do not allow short circuits, otherwise, permanent damage will result. 3. Batteries cannot be used under extreme conditions, such as extreme temperatures, deep cycles, extreme overcharging, and overdischarging. 4. Store the battery in a cool, dry place. If storing or shipping a large number of batteries, the battery must be discharged first. 5. Do not solder directly onto the battery. 6. If the battery makes noise, experiences high temperatures, leaks, or experiences other abnormal circumstances, discontinue use immediately. 7. Do not dispose of it in a fire or attempt to disassemble it; the battery may burn or produce harmful substances. 8. Do not allow the old battery or half of the battery to be mixed with the new battery, otherwise over-discharging will occur. 9. Do not cut the casing or remove the battery from the casing. 10. Do not place the battery in water.