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Max battery life.

Discussion in 'Inspire 1 Discussion' started by imagesmad, Apr 28, 2015.

  1. imagesmad

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    Has anyone done an endurance test with their batteries ? The suggested 18 minutes for the standard battery, in my limited experience is a little optimistic, the best I have achieved so far is 15....
     
  2. The Editor

    The Editor Moderator
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    You do not say what level you are taking them down to?

    Please see this thread as this has been talked about before.
    http://www.inspirepilots.com/threads/flight-time.2380/#post-25647
     
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  3. imagesmad

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    I am taking them down to the recommended 30% mainly on the assumption that the indication on the App was the actual percentage and following the recommendations I had found on line.
    Subsequent to your post on another thread it seems safe ( from a battery health point of view ) to land by 0% ?
     
  4. The Editor

    The Editor Moderator
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    NO! - This level should only be used to calibrate the batteries. Flying anything below 20% you are getting into the rapid discharge part of the curve for lipos and the pack can drop voltage quite abruptly. The lowest I 'Fly' down to is 18%.
     
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  5. Kilrah

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    From a battery health point of view yes, BUT from an aircraft health point of view NO. 0% won't damage the battery as it will shut off to protect itself, which means that if you're still in the air you've now got a heavy and expensive brick falling down.
     
  6. imagesmad

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    `Thanks for that, I shall heed your warning - and continue to land soon after the 30% warning. :)
     
  7. huppe

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    I Always make sure I have eye contact when I reach 30%.But I have done over 21 minutes and was at 18%.Normally I land at 25%.Also it depends on the speed and wind how long you can fly
     
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  8. Sky High Photography

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    Oh god, I always fly my batteries down to 8%.
    30% come in, fly around to 15% then hover and land at 8%.
    Is this NOT a good idea?
    I remember replying in another post, god help me to find it, that this is exactly the proper process.
    I have never had any dramatic battery % drops, flight times are consistently 17-18 minutes and full charge times are around 80 minutes (all tb47 batteries).
     
  9. damoncooper

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    You cats are Wild and Cra-azy guys :)
    ImageUploadedByTapatalk1430351010.650740.jpg
    I'm within eyeshot of home at 35% and landing before 30%.

    Am I needlessly leaving happy minutes of airtime on the table?
     
  10. Kilrah

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    It's pretty OK, if you are hovering in front of you and you get a sudden drop you can just land. A bit of a waste of time IMO, but each to his own :)
     
  11. The Editor

    The Editor Moderator
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    I believe you are sir!
    I have my low battery alarm set at 28%, this gives me around 2 minutes until I get down to 19-20% where I land.
    If you are landing before 30% I would guesstamate you are short changing yourself out of around 3 or 4 minutes of 'safe' airtime.
     
  12. Sky High Photography

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    Good thread.
    I am thinking that flying my batteries down to 8% might be "stressing" them so I am going to follow the norm of the experienced pilots and fly no lower than 18%.
     
  13. sirnikolas

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    I'm a tad concerned with the readings from my batteries (please see attached)
    Battery 1 I received with the bird and the other 2 I bought together at a later date.
    Should I be worried?
    Battery 1.jpg
    Battery 2.jpg
    Battery 3.jpg
    Thanks.
     
  14. Chad johnson

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    Don't forget that many times the batteries can drop from 25% to 7% to 3% within 10 seconds, especially if you haven't deep cycled the battery after 10 flights. It just happened to me. I was expecting it though and was hovering low. But that has happened to people over water who were still far out at 25%. I think it's safer to just try to get your shots before 30% and keep it safe. Get more batteries if you need more time. A crash isn't wort it. 2 months minimum is a looooong time to wait for DJI to fix your bird just because you wanted an extra minute or two.
     
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