title_body: Is there an advantage to having more LiPo cells in a low-power drone? A major reason that high performance racing or freestyle drones use LiPo batteries with high cell count (6s rather that 3s or 4s) is so that the voltage won't sag as much. This allows high performance drones to operate longer when pushing the limits of their power. Is there, however, any advantage to using a high cell count LiPo in a drone that doesn't pull enough power to cause any significant battery sag?
upvoted_answer: The advantage of running at higher voltage is that you can use thinner wires and lower current (i.e. cheaper) ESCs, as power lost to resistance is proportional to current (squared) and not voltage.
  
  Another reason can be to reach higher prop RPM when you can't find motors with sufficiently high kV, or merely want to continue using the motors you already have. 
  
  Much of the discussion about increasing cell count is confused because people increase the total battery size, for example, going from 4s 1500mAh to 6s 1500. With 50% more battery it's not surprising that both flight time and the ability to provide bursts of power without voltage sag have increased. Similarly pushing more power through the same motor is not a free upgrade. Either it's using up a safety margin or the motors were larger and heavier than necessary in the original design.