New Zealand pilots can already buy P50B 4S1P packs from hobby shops. Molicel’s INR-21700-P50B is a 5000 mAh, 3.6 V, 18 Wh cell with a published 60 A continuous discharge (80 °C cutoff). It is a strong high-drain 21700, and it is the cell inside a lot of imported 4S1P Li-Ion packs on NZ shelves.
Hyperflux builds RS50 Black Series packs in New Zealand from genuine Reliance INR21700-RS50 cells: 5000 mAh, 70 A continuous on the Reliance datasheet, 140 A burst, 2.5 V cutoff. Packs are assembled and discharge-tested here. Custom 2P layouts are quoted on request — not a boxed import SKU.
This is not an attack on P50B. Both cells are 5000 mAh 21700s. The difference that matters on a pack is continuous current, who builds it, and whether you can order a 2P or odd layout.
Cell and pack comparison
| Cell | Capacity | Continuous A | Where to buy | Built in NZ? | Custom? |
|---|---|---|---|---|---|
| Reliance RS50 | 5000 mAh | 70 A (datasheet) | Hyperflux packs and loose cells | Yes — packs assembled in NZ | Yes — 2P and custom layouts |
| Molicel P50B | 5000 mAh | 60 A (datasheet) | NZ hobby shops (typical 4S1P packs) | Imported packs / cells | Shop SKU, not a custom bench |
RS50 figures are from the official INR21700-RS50 datasheet. P50B continuous current is Molicel’s published 60 A rating (temperature cutoff 80 °C). Always check the sheet for the batch you buy.
What that means on a 4S or 6S pack
A Hyperflux 4S1P is 72 Wh at about 300 g with 70 A continuous. A Hyperflux 6S1P is 108 Wh at about 445 g with the same 70 A. A typical P50B 4S1P from a hobby shop is also ~5000 mAh / ~72 Wh, with 60 A continuous on the cell sheet. Energy is in the same class. Current headroom and the NZ workshop are not.
If you want Li-Ion runtime with more current, Hyperflux builds 2P layouts to order — 2S2P and 4S2P on request, plus 6S2P cinelifter and robotics packs via custom. Those are not shelf photos of unbuilt packs; they are quoted, built, and bench-tested when ordered.
Shop the 4S 5000mAh Li-Ion pack, the 6S 5000mAh Li-Ion pack, or the genuine RS50 cell.