Side-by-side comparison of Samsung INR21700-40T (21700) and Molicel INR21700-P42A (21700)
| Samsung INR21700-40T | Molicel INR21700-P42A | |
|---|---|---|
| Capacity | 4000 mAh | 4200 mAh |
| Nom. Voltage | 3.6 V | 3.6 V |
| Max Current | 35 A | 45 A |
| Weight | 70 g | 70 g |
| Energy | 14.4 Wh | 15.1 Wh |
| Energy Density | 206 Wh/kg | 216 Wh/kg |
| Form Factor | 21700 | 21700 |
| Typical R_int | 19.8 mOhm | 17.6 mOhm |
Showing 10A discharge rate for both cells
| Current | Samsung INR21700-40T | Molicel INR21700-P42A |
|---|---|---|
| 0.8A | 19.8 | — |
| 0.84A | — | 17.6 |
| 4.0A | 17.1 | — |
| 4.2A | — | 15.2 |
| 10.0A | 17.1 | 15.2 |
| 20.0A | 16.6 | 14.7 |
| 30.0A | — | 14.4 |
| 35.0A | 16.2 | — |
Values in mΩ. Bold = lowest resistance at that current.
The Molicel P42A offers 5% more capacity (4200 vs 4000 mAh). The Molicel P42A supports higher continuous discharge (45A vs 35A), making it better for high-drain applications. The Molicel P42A has better energy density (216 vs 206 Wh/kg).