Samsung INR21700-50E Li-ion Cell, 5000mAh, 9.8A

The Samsung INR21700-50E is a high-capacity Li-ion cell designed for endurance-oriented applications. With a 5000 mAh capacity and a 9.8 A continuous discharge rating, it provides extended runtimes in UAVs, portable systems, and industrial applications where energy density is prioritized over high-drain performance.

Typical use cases include long-range UAV and FPV builds, fixed-wing aircraft, and portable power banks, where efficiency and long cycle life are critical.

With an energy rating of ~18 Wh per cell and a low internal resistance (~18–22 mΩ), the 50E maintains stable operation under moderate loads. While it cannot match the current output of high-drain cells like the Samsung 40T or Molicel P42A, it excels in applications requiring maximum capacity and reliable endurance.

Key Specifications:

• Type: Li-ion Rechargeable Cell

• Model: Samsung INR21700-50E

• Format: 21700 cylindrical

• Nominal Capacity: 5000 mAh (5.0 Ah)

• Nominal Voltage: 3.6 V

• Full Charge Voltage: 4.2 V

• Cut-off Voltage: 2.5 V

• Max Continuous Discharge: 9.8 A

• Peak Discharge: up to 14–15 A (≤5 s with cooling)

• Internal Resistance (IR): ~18–22 mΩ

• Energy: ~18 Wh

• Chemistry: NCA/NCM (LiNiCoAlO2 / LiNiMnCoO2)

• Dimensions: Ø 21 mm × 70 mm

• Weight: ~68–70 g

• Cycle Life: 500–800+ (with proper care)