Li-Ion 21700

21700 Lithium-Ion Battery – High-Capacity Rechargeable Battery Pack The 21700 Lithium-Ion Battery is a high-capacity rechargeable battery designed for applications that require reliable energy storage, long runtime and efficient power delivery. Its larger 21700 cell format offers higher capacity and energy density compared with many traditional 18650 cells. Ideal for FPV drones, UAVs, robotics, RC projects, portable electronics and custom battery packs, this battery can provide excellent endurance when configured with the appropriate number of cells and a suitable Battery Management System (BMS). Key Features High-capacity 21700 Lithium-Ion cell Rechargeable battery technology Excellent energy density Long runtime and endurance Suitable for custom battery-pack configurations Available in different capacities and discharge ratings Suitable for FPV, UAV and RC applications Compact cylindrical cell design Reliable performance when used within manufacturer specifications Specifications Battery Type: Lithium-Ion (Li-Ion) Cell Size: 21700 Nominal Voltage: 3.6V–3.7V per cell Fully Charged Voltage: 4.2V per cell Configuration: 1S, 2S, 3S, 4S and higher Capacity: Depends on selected cell model Rechargeable: Yes Applications: FPV Drone, UAV, RC, Robotics and DIY Battery Packs Important For drone use, select the correct cell capacity, continuous discharge rating, S configuration and BMS/charger according to your drone's power requirements. Do not short-circuit, overcharge, over-discharge or physically damage the cells. Ideal For: Long-range FPV drones, UAVs, robotics, RC vehicles and high-capacity custom battery packs.