Welcome to PhantomPilots.com

Sign up for a weekly email of the latest drone news & information

Battery life (critical voltage and propulsion output limited)

Discussion in 'Pro/Adv Discussion' started by DeGurk, Feb 11, 2016.

  1. DeGurk

    Joined:
    Feb 11, 2016
    Messages:
    3
    Likes Received:
    0
    For the first time I've gotten a warning about the battery level voltage being critical.
    The phantom was flying in the garden (I was going to 8% >20 cycles) and was lucky enough to catch it, when out of the blue it started descending because of the voltage. This happened with 40% battery.

    After some research I found out that it was probably because I had not used the battery in approximately one month. So I took it down to 8% (Let it run indoor), charged it all the way and gave it a go to monitor the battery.
    It went fine till +- 50% then it gave a warning: "Propulsion output limited to protect battery"

    Can I still safely use this battery?

    I've added screenshot's form "Healthy Drones" of today's log and the log file



    Info:
    Battery: 22 cylces
    Temp outside: 8 degrees (Celsius)
    Wind: Force 4-5 (18 knots)

    upload_2016-2-11_14-53-54.png
     

    Attached Files:

  2. Mark The Droner

    Joined:
    Aug 26, 2015
    Messages:
    3,959
    Likes Received:
    1,156
    Location:
    Brookeville, MD, USA
    What was the temp of the battery?
     
  3. DeGurk

    Joined:
    Feb 11, 2016
    Messages:
    3
    Likes Received:
    0
  4. Mark The Droner

    Joined:
    Aug 26, 2015
    Messages:
    3,959
    Likes Received:
    1,156
    Location:
    Brookeville, MD, USA
    Battery temp doesn't seem to be the problem.

    I think it's kind of a judgement call on your part. If it was me, I'd mark it and use it gently. Any hard runs, I'd use a different battery. MHO
     
  5. DeGurk

    Joined:
    Feb 11, 2016
    Messages:
    3
    Likes Received:
    0
    I did another run with an other battery, same conditions and the same result!
    Probably it has to do something with the outside temperature vs the voltage left in the battery.

    Thanks
     
  6. Schnerds

    Joined:
    Jul 31, 2015
    Messages:
    11
    Likes Received:
    1
    Had the same issue today for both batteries flying around my house in 60 degree weather. I have never seen this message till my last flight now I can't figure out how to fly without the error...
     
  7. Mark The Droner

    Joined:
    Aug 26, 2015
    Messages:
    3,959
    Likes Received:
    1,156
    Location:
    Brookeville, MD, USA
    That's weird. It seems your aircraft is drawing more voltage than it should. Why? Could it be one of your motors is going bad?
     
  8. Schnerds

    Joined:
    Jul 31, 2015
    Messages:
    11
    Likes Received:
    1
    I should have added I had the motor mount cracks and just got it back from
    DJI California a few weeks ago, not sure if when moving to a new shell something wasn't installed correctly