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Battery light is red when turning off battery

Discussion in 'Pro/Adv Discussion' started by sakau2007, Apr 19, 2016.

  1. sakau2007

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    I have 7 batteries and for as long as I've had my Phantom, turning them off has been pretty straightforward... you press the button once, then press and hold it for a few seconds and it turns off.

    However now on 3 of the batteries, instead of turning off the battery remains on and the indicator light on the battery is solid red. I can then press the button again and it turns off, but I find this odd.

    Without going full diagnostic on it, is something wrong with the battery? Are they repairable or should they be trashed? I know at least one of the batteries has been involved in a minor crash and thought that could be the source of it, but did not know exactly what the red light means and if I should continue flying with those batteries.

    Thanks.
     
  2. SamNetwork

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    You may need to perform a deep discharge.
     
  3. sakau2007

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    Is this where I simply allow the battery to die on its own and then recharge it?
     
  4. NimpoCub

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    Something like that. Drain battery down to about 8-10% (in low hover will be quickest). Do not go to 0 as you will likely toast the batt. THEN do a full charge.

    Turning off: Sounds like your first (quick) press is too short. That would cause your batt. to remain on.
     
  5. Mark The Droner

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    Isn't there some kind of hibernation mode on those P3 batteries? You might want to check that out.
     
  6. Trackman1

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    From P3A user manual v1.6 (they should all be same for batterys)
    -----------------------------------------------------------------------------------------------------------------
    Page 21
    How to discharge your Intelligent Flight Battery:

    Slow : Place the Intelligent Flight Battery into the Phantom 3 Advanced’s Battery Compartment
    and turn it on. Leave it on until there is less than 8% of power left, or until the battery can no
    longer be turned on. Launch the DJI GO app to check battery levels.

    Rapid : Fly the Phantom 3 Advanced outdoors until there is less than 8% of power left, or until
    the battery can no longer be turned on.
    --------------------------------------------------------------------------------------------------------------------
    I hover mine down to 15 -20%
    Bring in. Remove battery and let everything cool for 1/2 hour.
    Then take props off. Put on table and leave on until I see 7%.
    The next time I might try leaving until it shuts off.

    I believe a slower drop will produce a more uniform voltage across the cells.

    Some people suggest leaving a fan blowing at the bird for cooling.
     
  7. Numone

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    Interesting. You say "
    Bring in. Remove battery and let everything cool for 1/2 hour.
    Then take props off. Put on table and leave on until I see 7%."
    Do I take it you run the motors without the props? If so I presume there's no ill effects of doing that, as it seems like a good idea!?
     
  8. Multicoptertec

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    Could still be writing something to the SD card.


    Sent from my iPhone using PhantomPilots mobile app
     
  9. Trackman1

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    I just did it. Hovered and landed at 11%
    Brought in house, took props off. Took battery out to cool for 15 minutes.
    Put back in and start p3 and just left alone until 6% as showing on tablet.
    All cells were at 3.66v showing green.

    Took battery out and put on charger.

    I believe lowering the voltage at the end more slowly may be better for the battery.
    All cells come down nice and even.

    I will not run the motors without props. (without load and air flow)
    It may not hurt to do it. But it sure doesn't hurt not to do it.
     
  10. toegema

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    You should not run the motors at full speed without the props on. The DJI GO app if turned on will quickly give a Message saying the motors are run above normal operation. They might overheat.
     
  11. Raveneapoe

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    If you discharge the battery by hovering, disable RTH! I did this once, *thought* I had RTH disabled and my Phantom P3A entered RTH, flew up and hit a tree limb...Destroying my camera!
     
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