In this test, I evaluated the DXF 5200mAh LiPo battery using internal resistance measurements and a 100A load test. I used my RC LiPo calculator to determine the real C rating based on IR, then compared the results to the Zeee battery, which was previously the worst-performing pack tested on the channel.
What Makes It Unique
The DXF 5200mAh stands out for one reason — its extremely high internal resistance. Both packs tested showed very consistent IR readings across cells. This is not something I always see, and it usually indicates good cell matching. However, in this case, the resistance values were the highest ever recorded on the channel. This immediately suggested the pack would struggle under load.
Internal Resistance (IR)
The internal resistance measurements from both packs averaged 10.0 mΩ per cell. These values were consistent between packs and across cells.
Using my LiPo calculator:
- Calculated C rating: ~11C
- Max continuous current: ~57A
This makes the DXF the lowest-performing pack tested so far in terms of calculated output capability. The IR values are unusually high, even compared to older, heavily used batteries.
Load Test
I ran a 100A discharge test under identical conditions for both batteries.
The results:
- Test duration: Under 10 seconds before cutoff
- Massive voltage drop immediately under load
- Current dropped below 100A within ~3.5 seconds
- Usable capacity at 100A: ~250mAh (DXF) vs ~774mAh (Zeee)
- Capacity at 3.50V: ~12mAh (DXF) vs ~46mAh (Zeee)
- Time to 3.50V: ~0.7s (DXF) vs ~1.9s (Zeee)
- Voltage at 10 seconds: 3.29V (DXF cutoff reached early) vs 3.40V (Zeee)
- Energy delivered: ~51Wh (DXF) vs ~156Wh (Zeee)
The DXF showed a severe inability to sustain load. Voltage collapsed almost immediately, triggering low voltage cutoff in under 10 seconds. This is now the shortest runtime recorded on the channel.
Practical Applications
For RC use, the DXF 5200mAh has major limitations:
- Cannot sustain high-current loads (~100A)
- Very low usable capacity under load
- Rapid voltage drop causes early cutoff
- Not suitable for most modern high-power RC vehicles
Even partial throttle use could result in immediate cutoff if the battery is not near full charge.
Final Thoughts
The DXF 5200mAh LiPo battery delivered the weakest performance I have recorded so far. Despite consistent cell matching, the extremely high internal resistance limits its usable output significantly.
It showed the lowest calculated C rating, the shortest runtime under load, and the lowest energy delivery. Compared to the Zeee battery, which was already the previous lowest performer, the DXF underperformed across nearly every metric.
The only exception was average cell wattage, which appeared higher due to the extremely short test duration. This does not reflect real sustained performance.
Overall, the data shows this pack is not capable of delivering the current expected from modern RC applications.
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