21700 Li-Ion Cell
Reliance RS50 21700 Cell
$16.99
Genuine Reliance INR21700-RS50, direct-sourced, never relabeled. 3.6V nominal, 5000mAh, 66g, datasheet-rated 70A continuous / 140A burst (5s), with 500+ cycles to 80% capacity. The same cell inside every Black Series pack. Sold per cell for custom builds, repairs, and spares.
70A Continuous140A Burst (5s)500+ Cycles5000mAh
| Model | INR21700-RS50 |
|---|---|
| Capacity | 5000 mAh (min. 4950 mAh) |
| Nominal voltage | 3.6 V |
| Energy | 18 Wh |
| Weight | ≤ 67.0 g |
| Dimensions | 21.35 × 70.30 mm (max) |
| Continuous current | 70 A |
| Burst current | 140 A (5 s) |
| Connector | Bare cell |
| Balance tap | n/a |
| Charge rate | 0.5C (2.5 A) standard · 8 A rate |
| Charge voltage | 4.20 V |
| Cutoff voltage | 2.5 V |
70A continuous140A burst (5s)
Official Reliance RS50 cell datasheet (PDF) ↓Loose cells short if the ends touch metal. Do not carry them loose, and do not solder the cell. Use a spot welder and a holder. Charging notes.