Can You Use 18650 Li-ion Cells Instead of LiPo Batteries in RC Planes?

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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 designed for high current discharge, which suits the demands of RC planes. 18650 cells typically have lower discharge rates, so first check the continuous current rating to ensure it meets your motor’s needs.

Step-by-step advice:

  1. Calculate your plane’s current draw at full throttle.
  2. Choose 18650 cells with a continuous discharge rating above this current.
  3. Assemble the cells in a series/parallel configuration to match your required voltage and capacity.
  4. Use a proper battery management system (BMS) to protect against overcharge, over-discharge, and balance the cells.
  5. Check the weight difference—18650 packs can be heavier, affecting flight performance.
  6. Test your setup carefully on the ground before flying.

Overall, while not ideal due to weight and discharge limitations, 18650 cells can work if matched correctly and protected properly.

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