The Samsung INR21700-50S combines high capacity with a high discharge current in the 21700 format. It is a benchmark cell for building and repairing e-bike batteries, e-scooters, power tools and high-power packs.
Key features
-
5000 mAh typical capacity (4800 mAh minimum)
-
25 A continuous discharge, up to 45 A with thermal cut-off at 80 °C
- Fast charging up to 6 A
- Samsung SDI branded cell, designed for electric motors and e-mobility
- 21700 format: more energy per cell than an 18650, so fewer welds per pack
Technical specifications
| Model |
Samsung INR21700-50S |
| Chemistry |
Lithium-ion (INR) |
| Typical / minimum capacity |
5000 mAh / 4800 mAh |
| Nominal voltage |
3.6 V – 3.7 V |
| Charge cut-off voltage |
4.2 V |
| Discharge cut-off voltage |
2.5 V |
| Max. continuous discharge |
25 A (without thermal cut-off) |
| Max. continuous discharge with thermal monitoring |
45 A (cut-off at 80 °C) |
| Standard charge current |
2.5 A |
| Max. charge current |
6 A |
| Charging method |
CC-CV |
| Positive terminal |
Flat top |
| Protection circuit |
No (bare cell) |
| Dimensions |
Ø 21.15 mm × 70.52 mm |
| Weight |
approx. 72 g |
Applications
Rebuilding and manufacturing of e-bike batteries, electric scooters, cordless power tools, model making, high-power lights and storage systems with BMS.
Safety warning
Unprotected cell intended for assembling packs fitted with a BMS. To be used only by qualified persons. A short circuit or improper handling may cause a fire or an explosion. Do not use directly in a light or device without protection electronics. For a custom pack, our workshop can build the battery for you.
