Using 18650 Li-ion Cells Instead of LiPo 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 preferred because they deliver high current with a low internal resistance, essential for the bursts of power RC planes need. 18650 cells typically have lower discharge rates, which may limit performance or cause voltage sag.

If you want to try 18650 cells, follow these steps: 1) Choose high-quality, high-drain 18650 cells rated for at least 10-20A continuous discharge. 2) Connect cells in series and parallel to match your plane’s voltage and capacity requirements (e.g., 3S or 4S configuration). 3) Use a proper battery management system (BMS) for balancing and protection, since Li-ion cells are more sensitive than LiPo. 4) Ensure your ESC and motor can handle the battery’s voltage and current limits. 5) Monitor temperature closely during use; Li-ion cells can get hot and are less tolerant to rapid discharge.

In summary, while possible, 18650 cells may reduce performance and require careful setup. For best results, stick with LiPo unless you have experience adapting your system.