The Samsung INR21700-58E is a high-capacity lithium-ion cell in the 21700 format, specially designed to offer a long runtime whilst maintaining a stable discharge current. With its 5330 mAh capacity, it is ideally suited to batteries requiring high energy density, such as packs for electric bikes, portable tools, power banks, high-output lamps or custom power supply systems.
Thanks to its INR (NMC) chemistry, this cell offers an excellent balance between performance, safety and longevity. It is supplied without built-in protection (unprotected), making it ideal for assembling professional or DIY systems fitted with a suitable BMS.
Key features
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Very high capacity of 5330 mAh, ideal for maximising runtime.
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Continuous discharge current of 10.7 A, sufficient for many applications.
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21700 format: higher energy density than a standard 18650.
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Raw (flat-top) cell: perfect for bespoke assemblies or pack repairs.
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A versatile solution for power banks, e-bike batteries, portable storage, etc.
Technical specifications
| Specification |
Details |
| Model |
Samsung INR21700-58E |
| Format |
21700 |
| Nominal capacity |
5330 mAh |
| Minimum capacity |
~5,170 mAh |
| Nominal voltage |
3.6–3.7 V |
| Maximum charging voltage |
4.20 V |
| Recommended minimum voltage |
~2.5 V |
| Continuous discharge current |
10.7 A |
| Chemistry |
Li-ion (INR / NMC) |
| Positive electrode |
Flat-top |
| Weight |
Up to 74 g |
| Built-in protection |
No (bare cell) |
