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: You can use 18650 Li-ion cells in an RC plane, but there are important considerations. LiPo batteries are preferred because they have a high discharge rate and light weight, which suits the power demands and weight restrictions of RC planes. 18650 Li-ion cells typically have a lower continuous discharge rate, so they may not deliver enough current for high-performance motors.

If you want to try 18650 cells, ensure you use high-quality cells with a high continuous discharge rating (20A or more). Connect enough cells in series and parallel to match the required voltage and current. Use a suitable battery management system (BMS) to protect against overcharge, over-discharge, and balance the cells.

Also, consider the weight increase, as 18650 packs are usually heavier than LiPo packs of similar capacity. Test the setup carefully on the ground before flying. Monitor cell temperatures and voltage during use, and avoid pushing the cells beyond their limits to ensure safety and performance.