Two Batteries in parralel Vs One

Posted by Damo on August 29, 2013 at 1:19pm

hi all,

I gathered information that i would like to share in case it helps anyone.

Test: Fly to 4 ft and enable loiter until low voltage alarm sounds with the following batteries.

  • Test 1: Battery A 5000 mah 3s = 11 Minutes
  • Test 2: Battery B 5000 mah 3s = 11.5 Minutes
  • Test 3: Battery A and Battery B connected in parallel = 16.38 minutes

I was hoping for more with the two in parralel but the results show me that its not worth the extra effort having two batteries like this - essentially i am losing 5 minutes of flight time if i just used the two on their own (i.e test 1 and 2)

thanks

damo

Battery A

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Battery B


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Battery A and Battery B in Parallel

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Replies

  • iskess August 29, 2013 at 11:15pm
    This is interesting but doesn't answer the burning question I have. How does 2 batteries in parallel compare to a single battery of double the capacity. In this example a single 10,000Mah 3S. This takes most of the weight question out and just deals with the electrical efficiency.
  • Developer
    Bill Bonney August 29, 2013 at 8:52pm
    But you may have got longer if you increased the prop size and drew more of the potentially supported current but with more thrust to compensate the weight.
  • dr0n3droid August 29, 2013 at 4:51pm
    Law of diminishing returns.
    I parallel two 2200mah 3s. 9min each or 15min for both @ hover until fail.(<10.5v) Which for me translates to 12min flying, or 9min in ACRO.
    You get ~73% of two individual batteries when in parallel. I'm getting ~83%.
    What is your AUW? My copter is <1500g.
  • Juan Carlos Hdez August 29, 2013 at 1:40pm

    This was expected.
    The copter has to deal with the extra weight of the second battery. Batteries takes a high percentage on the total weight.

This reply was deleted.