Using 18650 Li-ion Cells Instead of LiPo Batteries in RC Planes

Question: Can I use Li-ion 18650 cells instead of LiPo in an RC plane?

Answer: You can use 18650 Li-ion cells in an RC plane, but there are important considerations. LiPo batteries are designed for high discharge rates, which RC planes require for motors and speed controllers. Most 18650 cells have lower continuous discharge ratings, so check the cell's maximum current output carefully. If it’s too low, your motor may underperform or you risk damaging the battery.

To use 18650 cells, you’ll need to build a battery pack with the right voltage and capacity by wiring multiple cells in series and parallel. Make sure to include a proper Battery Management System (BMS) to balance cells and protect against overcharge, over-discharge, and short circuits.

Also, 18650 cells are heavier and bulkier than LiPos, which may affect your plane’s balance and flight time. Measure and test your setup thoroughly before flying. In summary, it’s possible but requires careful selection, assembly, and safety precautions.