18650 Rechargeable Li-ion Battery Pack 7.4V with Built-in Smart Protection Board StableVoltage LongLasting Power for Fan

一. Core Functions & BenefitsStable Power Supply, Compatible with Medium and High PowerCompared with a single 7.4V cell, the voltage is doubled while the current is halved at the same power. It reduces line loss and heat generation, improves efficiency, and is suitable for loads such as motors, cameras and displays.Portable Energy Storage & Mobile EnduranceCompact and lightweight with rechargeable cycle performance. It provides long-duration DC power supply for scenarios without mains electricity, including outdoor activities, mobile use and emergency backup.High Power Output & Instant High CurrentThe LiPo (Lithium Polymer) version supports high-rate discharge, delivering instant power burst for drones, remote-controlled cars and power tools.Safe Voltage Regulation & Device ProtectionBuilt-in BMS protection board prevents overcharging, over-discharging, over-current and short circuit. It maintains stable output voltage to protect the safety of connected electrical equipment.二. Common Application ScenariosRC Models: Drones, RC cars / boats / helicoptersPhotography & Videography: DSLR / mirrorless camera batteries, camcorders, fill lightsPortable Electronics: Bluetooth speakers, megaphones, video players, headlampsPower Tools: Electric drills, angle grinders, electric screwdriversRobotics & Medical: Mini robots, portable medical equipment, patient monitorsEmergency & Outdoor: Emergency lights, portable power stations, outdoor lamps, fishing lights