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Battery discharge rate

Discussion in 'General Discussion' started by darwin-t, Jul 24, 2014.

  1. darwin-t

    Apr 28, 2014
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    I notice that the stock battery for my FC40 has a 20C discharge rate. My 2700 mAh battery has a 35C discharge rate.

    I assume the FC40 discharges a battery at 20C or less. Does using a battery with a higher discharge rate affect the performance of the quad or the battery?

    I also assume that using a battery with a lower discharge rate can overload the battery and cause it to fail. Is this right?
  2. OI Photography

    Sep 23, 2013
    Likes Received:
    Clarksville, TN
    Yes, trying to drain a battery at a higher rate than the battery's discharge C-rating can ruin it pretty quickly, but the more immediate effect you would have to worry about is your motors getting inconsistent and/or inadequate power...and I'm sure you can picture the disaster that could be.

    Running a 20C-rated battery as small as 2200mAh should be fine, the Phantom draws comfortably less than even the 44Amps a batt like that would cap you at.

    To answer your other question, flying with a battery rated much higher than you need won't affect the performance of the quad in any way beyond the weight penality that higher-C batteries bring.
  3. jumanoc

    Jan 21, 2013
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    If you not fly agressive mode :) it doesn't matter if the battery is 20C, 30C, 40C, etc. as mor C-rating as more responsive power when fast moves.