18650 7.4V Lithium Battery Functions & Applications## 1. Product BasicsAssembled with two 18650 cells in series, rated voltage 7.4V. Built-in protection board, featuring safety and stability, long battery life and compact size.## 2. Core Functions1. Provides stable 7.4V continuous power supply with smooth voltage output.2. Built-in charge and discharge protection: overcharge, overdischarge, overcurrent, short circuit and temperature control protection.3. Supports cyclic charging and discharging, reusable for energy saving and environmental protection.4. High discharge performance, strong load capacity and long endurance.5. Lightweight and portable, shockproof and drop-resistant, ideal for mobile devices.## 3. Main Applications1. Lighting: High-lumen flashlights, headlamps, searchlights, outdoor camping lights, solar LED lights.2. Security Monitoring: Home cameras, wireless monitoring devices, alarm systems.3. Small Appliances: Handheld fans, small water pumps, nebulizers, sprayers.4. Audio & Digital: Bluetooth speakers, megaphones, media players, outdoor audio systems.5. Tools & Equipment: Small power tools, distance meters, thermometers.6. Outdoor Energy Storage: Portable power banks, small outdoor standby power supplies.7. Medical & Household: Massage devices, physical therapy equipment, small household charging devices.