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 it’s possible to use 18650 Li-ion cells in an RC plane, they are not a straightforward replacement for LiPo batteries. LiPo batteries are designed for high discharge rates, which RC planes often require for good performance. In contrast, 18650 cells typically have lower discharge rates and are heavier, which can affect flight time and manoeuvrability.

If you want to try 18650 cells, follow these steps: 1) Check the continuous discharge rating (CDR) of your cells to ensure it meets or exceeds your plane’s motor demands. 2) Assemble the cells into a pack with the correct series and parallel configuration to match your voltage and capacity needs. 3) Use a proper battery management system (BMS) for safe charging and discharging, as 18650 cells require balancing. 4) Secure the pack firmly in the plane to avoid movement and damage.

Keep in mind, LiPo packs are lighter and deliver power more efficiently, so 18650 packs may reduce performance. For beginners or high-performance models, sticking with LiPo is usually best.