Question: Can I use Li-ion 18650 cells instead of LiPo in an RC plane?
Answer: While 18650 Li-ion cells can technically power an RC plane, they are usually not ideal replacements for LiPo batteries. LiPo batteries deliver high current bursts needed for motors and are lightweight with a flat discharge curve. In contrast, 18650 cells have lower continuous discharge rates and are heavier, which can reduce flight performance and increase plane weight.
If you still want to try 18650 cells, follow these steps: 1) Check the motor's current draw and ensure the 18650 cells can safely supply it without overheating. 2) Use a proper battery holder or spot-weld the cells into a pack with balanced wiring. 3) Include a suitable battery management system (BMS) for charging and cell protection. 4) Secure the pack firmly in the plane to avoid damage during flight. 5) Test the setup on the ground to monitor temperature and voltage under load.
Overall, LiPo batteries remain the recommended choice for RC planes due to their power-to-weight ratio and discharge capabilities.
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