Can I Replace LiPo Batteries with 18650 Li-ion Cells in an RC Plane?

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

Answer: While it’s technically possible to use 18650 Li-ion cells, they are generally not the best choice for RC planes compared to LiPo batteries. LiPo cells are designed for high discharge rates, which is crucial for the power demands of RC planes. 18650 cells typically have lower discharge rates and higher weight, which can reduce performance and flight time.

If you want to try 18650 cells, follow these steps: 1) Select high-quality 18650 cells with a continuous discharge rating suitable for your motor’s current draw. 2) Use a proper battery holder or build a pack with a balanced charging circuit (BMS) to ensure safety. 3) Measure the total voltage to match your plane’s motor requirements (e.g., 3 or 4 cells in series for similar voltage to a 3S or 4S LiPo). 4) Test the setup carefully on the ground to monitor temperature and performance before flying.

Remember, the extra weight and lower discharge rate can affect flight characteristics, so LiPo remains the preferred option for most RC planes.