Can You Use 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: While it’s possible to use 18650 Li-ion cells in an RC plane, they are generally not recommended as a direct replacement for LiPo batteries. LiPo packs deliver high discharge rates (high C-ratings) essential for the bursts of current needed by motors in RC planes. 18650 cells typically have lower discharge rates, which can limit performance and may cause voltage sag during high demand.

If you want to try 18650 cells, follow these steps: 1) Check the continuous discharge rating of your 18650 cells to ensure they can handle your motor’s current draw. 2) Connect enough cells in series and parallel to match the voltage and capacity of your original LiPo pack. 3) Use a proper battery management system (BMS) for balancing and protection, as 18650 cells require careful monitoring. 4) Test the setup at low power and monitor temperatures closely (keep below 60°C).

In summary, 18650 cells can work but are less suited for high-performance RC planes compared to LiPo batteries, which are designed specifically for this application.