Choosing 21700 cells for an FPV battery pack
Start with the aircraft’s measured load and pack requirements, then compare cell specifications.
Specify the load
Record the required series and parallel arrangement, mass budget, peak and sustained current, and intended operating temperatures. Capacity alone cannot determine compatibility.
Compare suitable candidates
Compare EVE 50PL, Samsung 50S and Nurda MT50P by their exact current conditions, dimensions, mass and charging limits. A model on this list is not a guarantee of suitability for every aircraft.
Validate the assembled pack
Pack construction and testing require appropriate equipment and expertise. Cell matching, insulation, interconnects and thermal behaviour must be validated for the intended application; avoid working from an advertised maximum current alone.
Check chemistry, voltage, format and the specific model’s datasheet for compatibility.
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