Most FPV pilots grew up on 4S or 6S LiPo: light, brutal current, four to six minutes on a 5-inch. Lithium-ion 21700 packs flip that trade. You give up some peak punch on a 1P pack and get two to three times the airtime at less weight for the same watt-hours.
The numbers that actually change the flight
| Typical 6S 1300–1500 mAh LiPo | Hyperflux 6S1P Li-Ion | |
|---|---|---|
| Capacity | 1300–1500 mAh | 5000 mAh |
| Energy | ~30 Wh | 108 Wh |
| Weight | ~350–450 g | ~445 g |
| Continuous current | High (C-rating) | 70 A |
| Typical cruise | 4–6 min | 15–25 min on an efficient 7-inch |
| Cycle life | ~100 hard cycles | 500+ to 80% capacity |
When Li-Ion is the right pack
Long-range, cinematic, cruising 5-inch, and anything where you are not pinned at full throttle the whole flight. The 4S 5000mAh Li-Ion pack (72 Wh, ~300 g) and 6S 5000mAh Li-Ion pack (108 Wh, ~445 g) are built for that. Lithium-ion holds voltage better at cruise than a sagging LiPo, so the last minutes still feel like flying, not dumping.
When to stay on LiPo — or step to 2P
Hard freestyle and gate racing still favour LiPo if you live at 100% throttle. A 1P Li-Ion pack is current-limited to 70 A continuous; that is plenty for efficient 5-inch and long-range, not a 6S 5-inch on 8-inch props at full punch. If you want Li-Ion runtime and LiPo-class current, the 4S2P doubles capacity and current (10000 mAh, 140 A continuous). Or request a custom layout.
Weight, not just milliamp-hours
A 5000 mAh LiPo in 6S is a brick. The Hyperflux 6S1P is about 40% lighter than a typical 6S 5000 mAh LiPo for the same energy, because 21700 Li-Ion is denser. That is why flight time scales harder than the mAh number suggests: more watt-hours on the airframe, less mass to haul.
Next: how much flight time Li-Ion actually gives and RS50 vs Molicel P45B.