Can 18650 Li-ion Cells Replace LiPo Batteries in RC Planes?

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

Answer: While 18650 Li-ion cells can be used in RC planes, they are not a direct replacement for LiPo batteries. LiPo packs provide high current output and are lightweight, which suits the power demands and weight restrictions of RC planes. In contrast, 18650 cells typically have lower discharge rates and are heavier, which can reduce flight performance and increase weight.

If you want to try 18650 cells, follow these steps: First, check the current draw of your plane’s motor and ensure the cells can safely supply that continuous current without overheating. Use cells with a high discharge rating (at least 10A continuous). Second, arrange the cells in a series and parallel configuration to match the voltage and capacity of your original LiPo pack. Third, use a proper battery management system (BMS) for charging and balancing, as 18650 cells require careful monitoring to avoid damage. Finally, test your plane carefully on the ground to check for overheating and performance issues before flying.

Overall, 18650 cells can work but expect lower power output and increased weight compared to LiPo batteries designed specifically for RC use.