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, essential for the power demands of RC planes. Most 18650 cells have lower continuous discharge ratings, so check the cell’s C-rating to ensure it can supply enough current for your motor and ESC. Also, 18650 cells are heavier, which affects flight time and handling.
To use 18650 cells, connect enough cells in series to match your required voltage (e.g., 3 or 4 cells for 11.1V or 14.8V nominal). Use a proper battery management system (BMS) or balance charger to safely charge and protect the cells. Ensure your ESC and motor can handle the voltage and current. Finally, test the setup on the ground first to monitor temperature and performance. If you need high power and light weight, LiPo is usually the better option, but 18650s can work for lower-power or budget builds.
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