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

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

Answer: While it’s possible to use 18650 Li-ion cells in an RC plane, they are generally not the best choice compared to LiPo batteries. LiPo cells are designed to deliver high current bursts needed for motors and provide a lighter, more compact power source. 18650 cells have lower maximum discharge rates and are heavier, which can reduce flight performance and increase weight.

If you decide to try 18650 cells, follow these steps: 1) Ensure the pack voltage matches your plane’s requirements by connecting the correct number of cells in series (each cell is about 3.7V nominal). 2) Use a battery management system (BMS) for safe charging and protection, as Li-ion cells are sensitive to overcharge and deep discharge. 3) Check the continuous discharge rating of the cells; it should meet or exceed your motor’s current draw. 4) Secure the battery properly to avoid vibrations and impact damage during flight.

Overall, for better performance and safety, stick to LiPo batteries designed for RC use whenever possible.