FT Lithium-ion Battery INR 21700 5000mAh 180A

The INR 21700 5000mAh Li-ion battery is a 21700 format cell designed for building high-power battery packs (for FPV drones, Unmanned Ground Vehicles, and portable charging stations).

The 21700 format denotes a diameter of 21.2 mm and a length of 70 mm. Compared to the previous generation 18650 cells, the 21700 battery offers up to 50% more internal volume.

The INR abbreviation stands for modern Lithium Nickel Manganese Cobalt (NMC) chemistry, allowing the cell to consistently deliver high currents without severe overheating while maintaining maximum capacity.

The combination of a high discharge rate (125A continuous, 180A burst) and a true capacity of 5000mAh sets this cell apart from most alternatives on the market. It ensures stable operation under extreme loads and significantly extends flight range.

21700 Li-ion cells are used in battery packs for 7–10+ inch FPV drones, fixed-wing UAVs, UGVs, as well as portable charging stations and heavy-duty power banks.

The low internal resistance of this high-discharge 21700 cell prevents severe voltage sag under load, while the thermal stability of its chemistry minimizes heat generation and degradation during prolonged high-current operation.

Key Advantages:

• 5000mAh capacity in a compact 21700 footprint;

• up to 180A (36C) burst discharge rate;

• internal resistance ≤ 5 mOhm;

• high energy density — up to 272 Wh/kg.

For orders of 1000+ units, pricing is negotiated individually. Please contact us for a custom quote.

• Cell Type: Li-ion
• Chemistry: INR
• Form Factor: 21700
• Nominal Capacity: 5000mAh
• Nominal Voltage: 3.6V
• Maximum voltage: 4.2V
• Energy Capacity: 18Wh
• Continuous Discharge Current: 125A (25C)
• Max Discharge Current: 180A (36C) for up to 5 seconds
• Discharge Cut-off Voltage: 2.5V
• Max Charge Voltage: 4.2V
• Initial Internal Resistance: ≤ 5 mOhm
• Energy Density: 272 Wh/kg
• Dimensions: ⌀21.2 × 70.5 mm
• Weight: 65 g