Drone Power Solutions (Flagship)
Nexfly 4S 40,000mAh Solid-State Drone Battery
4S1P 40000mAh 14.8V
The Nexfly 4S1P 40,000mAh is a semi-solid state drone battery manufactured by Leolus Energy for professional UAV applications. Rated at 14.8V nominal voltage, this battery pack delivers high energy density, stable discharge performance, and advanced BMS protection for agriculture spraying, surveillance, mapping, and delivery drones.
- Battery Model: Nexfly 4S1P
- Nominal Capacity: 40000mAh
- Nominal Voltage: 14.8V
- Battery Dimensions: H：47.5±2.0mm W：89.0±1.0mm L：205.0±2.0mm
- Battery Weight: ~1815g
- Cell Energy Density: ≥315WH
- Cycle Life: ≥600cycle
- Peak Discharge: 5C
Key Features -
Clean Energy with Smarter Innovation
Engineered with high-density lithium cells, our batteries provide extended lifecycle performance, ensuring years of dependable energy storage with minimal degradation.
The main event, what we are all here for. Cheer on the riders as they begin their course.
The main event, what we are all here for. Cheer on the riders as they begin their course.
The main event, what we are all here for. Cheer on the riders as they begin their course.
The main event, what we are all here for. Cheer on the riders as they begin their course.
The main event, what we are all here for. Cheer on the riders as they begin their course.
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What this pack actually delivers
| Nominal voltage | 14.8V — 4S (14.8V) |
|---|---|
| Capacity | 40,000mAh (40Ah) |
| Stored energy | 592 Wh — voltage × capacity, the number that actually decides flight time |
| Pack weight | approx. 2,200g |
| Energy density | 269 Wh/kg — computed for this pack, not a best-case figure from elsewhere in the range |
The top of the range. Worth it only on airframes built for the weight; on anything lighter the extra grams cancel most of the extra energy. This is a heavy-lift and endurance choice, not a default upgrade.
What it suits
lighter airframes where the mission is short, repeated and close in — inspection quadcopters, survey and mapping platforms, training fleets and camera drones.
What it is not for
heavy-lift and spraying work. At 14.8V a big payload forces current up rather than voltage, so the ESC and wiring run hot and the pack ages faster than the cycle count suggests.
Before you order
On 4S the practical limit is usually current, not capacity. If your motors are pulling hard at hover, more mAh will not fix it — you need more voltage.
Send us your airframe, all-up weight with payload, and the flight time you need. A pack that is right on paper and wrong on the aircraft helps nobody, and we would rather tell you a smaller pack is the better fit than sell you the largest one in the range.
Customer reviews
No reviews for this pack yet. If you have flown it, tell other operators how it held up — flight time, how it behaved in heat, how many cycles you have on it.
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Reviews are moderated before publishing. We do not edit them for tone — a three-star review that explains itself is more useful to the next buyer than a five-star one that does not.