Samsung INR21700-50E 5000 mAh 10A, Original Samsung SDI Cell

The Samsung INR21700-50E is one of the most popular 21700 battery cells in the world — and for good reason. With a high 5000 mAh capacity, proven NMC chemistry, and the reliability of Samsung SDI, this cell is widely used in e-bike battery packs, power banks, and energy storage systems worldwide. If you are looking for a genuine 21700 lithium-ion cell with real, dependable capacity, the Samsung 50E is a trusted choice.

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Why choose the Samsung 50E?

• 5000 mAh real capacity — no exaggerated figures, no misleading “up to” claims. Samsung SDI is known for precise manufacturing and strict quality control, so you get the performance stated on the label.
• Original Samsung SDI cell — Samsung SDI is one of the world’s leading lithium-ion battery manufacturers. The INR21700-50E is a genuine production model from an authorized supply chain, not a rewrapped or counterfeit cell.
• Widely used and well-documented — the 50E has become a reference standard in DIY battery pack projects and small-scale manufacturing. It offers known discharge characteristics, broad BMS compatibility, and a large existing knowledge base.

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Technical specifications

Model	INR21700-50E
Manufacturer	Samsung SDI
Cell format	21700 (21 mm × 70 mm)
Nominal capacity	5000 mAh
Nominal voltage	3.6 V
Charging voltage (max)	4.2 V
Cut-off voltage (min)	2.5 V
Continuous discharge current	9.8 A
Standard charging current	1.4 A (CC/CV)
Weight	~68 g
Chemistry	NMC (Lithium Nickel Manganese Cobalt Oxide)

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Applications

• E-bike battery packs — the Samsung 50E is commonly used in 10S, 13S, and 14S battery configurations thanks to its stable discharge curve and compatibility with popular BMS systems.
• Electric scooters and light electric vehicles — a great balance between capacity and size.
• High-capacity DIY power banks — in a 4P configuration, four cells can provide a total of 20,000 mAh.
• UPS and energy storage systems — suitable for low- and medium-power storage applications.

Energy-type cell optimized for capacity and runtime, not for high peak current. If your project requires more than 10–15 A continuous current per cell, please contact us before ordering.

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Samsung 50E vs 53G — quick comparison

If you are choosing between these two models: the Samsung 53G offers 5300 mAh (+6% capacity), which may result in noticeably longer range in larger battery packs. The Samsung 50E is more widely used, making it easier to find ready-made battery pack designs, BMS settings, and project documentation. Both are high-quality Samsung SDI cells.

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You are buying an original product

The Samsung 50E is one of the most frequently counterfeited 21700 cells on the market. Its popularity attracts low-quality clones with overstated specifications. The cells we offer come from an authorized Samsung SDI supply chain, and batches are checked before shipping. We do not sell counterfeit, recycled, or reclaimed cells.

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Need help before ordering? Contact us and we will help you choose the right battery pack configuration for your project.

Frequently asked questions

FAQ - Samsung INR21700-50E

1 - What is the Samsung INR21700-50E cell?

The Samsung INR21700-50E is a lithium-ion cylindrical cell in the 21700 format with a capacity of 5000mAh, a nominal voltage of 3.6V and a maximum continuous discharge current of 9.8A. It is used in e-mobility, torches, power tools, energy storage systems and RC modelling.

2 What are the dimensions and weight of the Samsung INR21700-50E?

The cell has a diameter of 21.25 mm ± 0.1 mm and a height of 70.8 mm ± 0.15 mm. Its weight is approximately 69 g.

3. what is the charge and discharge voltage of the cell?

• Nominal voltage: 3,6V
• Maximum charge voltage: 4,2V
• Minimum discharge voltage: 2,5V

4 Does the Samsung INR21700-50E cell have safety features?

No, the cell does not have built-in protection. When using it in applications requiring protection against overcharge, deep discharge or short circuit, external BMS (Battery Management System) must be used.

5 - How long does the Samsung INR21700-50E cell last?

When used correctly and charged according to the manufacturer's recommendations, the cell can last for more than 500 charge/discharge cycles while maintaining high efficiency.

6. can I use the Samsung INR21700-50E in an e-bike or electric scooter?

Yes, the cell is often used in e-bike and electric scooter batteries due to its high capacity and stable voltage. However, it is recommended to use it in kits with a suitable BMS.

7 What are the charging recommendations for this cell?

• Standard charging current: 2,45A
• Maximum charging current: 4,9A
• Do not exceed 4.2V when charging
• Use a charger designed for Li-Ion cells
• Do not leave the cell unattended during charging

8. can the Samsung INR21700-50E be discharged with a high current?

Yes, the cell supports a maximum continuous discharge current of 9.8A and pulsed up to 14.7A. This makes it well suited to devices requiring higher power.

9. is the Samsung INR21700-50E suitable for torches?

Yes, the cell is an excellent choice for high-power torches, offering long runtime and stable voltage.

10. can I use this cell in power tools?

Yes, but a cell with a higher maximum discharge current (e.g. Molicel P42A) will work better in power tools with high current consumption. The Samsung INR21700-50E, on the other hand, is an ideal choice for tools with moderate power requirements.

11. how to store the Samsung INR21700-50E?

• Store at a temperature of 10-25°C
• Do not store fully charged or fully discharged cells for long periods of time
• Protect from humidity, temperatures above 60°C and direct sunlight
• Store in special cell containers to prevent short circuits

12. can the Samsung INR21700-50E be transported by air?

Yes, but certain IATA regulations for transporting lithium-ion batteries must be met. A limited number of cells can usually be carried in hand luggage, but it is recommended that you check your airline's regulations.

13. can this cell be soldered?

Soldering directly on the cell is not recommended, as high temperatures can damage the internal structure of the cell and lead to failure or explosion. Instead, spot welding of nickel strips should be used.

14 What are the differences between the 21700 and 18650 cell?

Feature	21700 (Samsung INR21700-50E)	18650 (e.g. Samsung 30Q)
Diameter	21 mm	18 mm
Height	70 mm	65 mm
Capacity	5000mAh	3000mAh
Maximum discharge current	9,8A	15A
Cycle life	500+	300+

The 21700 cells offer greater capacity and energy efficiency compared to the older 18650 standard.

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