EVE 21700 40P Li-ion Cell, 4000mAh, 40A

The EVE 21700 40P is a high-discharge Li-ion cell with a capacity of 4000 mAh and a continuous discharge rating of 40 A. Designed for demanding applications, it is suitable for high-power battery packs in drones, e-bikes, tools, and industrial equipment.

Unlike typical 21700 cells limited to 10–20 A, the 40P delivers strong current while maintaining decent capacity, making it ideal for 6S, 12S, or larger packs in UAVs and endurance FPV drones.

The cell features low internal resistance, reducing heat buildup and voltage sag under load, ensuring stable performance during peak demands. With a chemistry based on NMC (Nickel Manganese Cobalt Oxide), it offers a good balance of energy density, cycle life, and safety.

Key Specifications:

• Type: Li-ion Rechargeable Cell

• Model: EVE 21700 40P

• Format: 21700 cylindrical

• Nominal Capacity: 4000 mAh (4.0 Ah)

• Nominal Voltage: 3.6 V

• Full Charge Voltage: 4.2 V

• Cut-off Voltage: 2.5 V

• Max Continuous Discharge: 40 A

• Peak Discharge: up to 45–50 A (≤5 s)

• Internal Resistance (IR): ~12–15 mΩ (fresh cell)

• Energy: ~14.4 Wh

• Chemistry: NMC (LiNiMnCoO2)

• Dimensions: Ø 21 mm × 70 mm

• Weight: ~68–70 g

• Cycle Life: 300–500+ (with proper use)