Samsung SDI · INR21700-40T
Discharge curves are synthetic estimates based on manufacturer specifications
4000mAh
Capacity
3.6V
Nom. Voltage
35A
Max Current
70g
Weight
14.4Wh
Energy
206Wh/kg
Energy Density
| SOC | 4A | 10A | 20A | 35A |
|---|---|---|---|---|
| 10% | 22.2 | 22.2 | 21.5 | 21.1 |
| 30% | 18.8 | 18.8 | 18.2 | 17.8 |
| 50% | 17.1 | 17.1 | 16.6 | 16.2 |
| 70% | 18.0 | 18.0 | 17.4 | 17.0 |
| 90% | 17.1 | 17.1 | 16.6 | 16.2 |
Values in mΩ. <25 = low, 25-40 = moderate, >40 = high
Ebike packs
48V/52V builds
Esk8 packs
High-drain layouts
FPV drone
Light, high-C packs
DIY powerwall
Large-capacity banks
Not sure how many cells you need? Use the pack calculator.
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