Digital Electronics
11.1V 3S Pack Adds 18 Minutes of Flight Time to Survey Drones
Published January 20, 2026Commercial survey UAV operator
A commercial UAV operator needed longer loiter time for mapping missions without exceeding the 500g registration threshold. EPT optimized a 4000mAh 3S pack with 25C continuous discharge.
At a Glance
Project snapshot
- Industry: Drones & UAV — aerial surveying
- Challenge: +18 min flight time within 500g all-up weight limit
- Solution: 11.1V 4000mAh 3S Li-polymer, 25C continuous, XT60 harness
- Outcome: 18 min gain validated in wind-tunnel and field missions
Key outcomes
- Flight time gain
- +18 min
- Configuration
- 3S 11.1V
- Discharge rate
- 25C cont.
- Weight budget
- < 500g AUW
The Challenge
Mapping contracts required longer single-battery missions to reduce swap stops over sensitive sites. Weight limits blocked simply stacking more cells.
Our Approach
EPT lightweighted the harness, selected high-grade 25C cells, and validated thermal performance in hover and cruise profiles at 35°C ambient.
Results
The operator completed average missions with one fewer battery swap, improving daily acreage coverage by roughly 12%.
drone batteryUAV3S Li-polymersurvey drone
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