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reduced power at first battery warning?

Discussion in 'Phantom 2 Vision Discussion' started by Migmon, Jan 4, 2014.

  1. Migmon

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    is this normal? i was flying the drone hard today just playing and when i got to the first warning at 25% i noticed it was descending... and i gave it more up and it barely went up, so i figured i was getting reduced power now... thought that didn't happen till the 2nd warning.
     
  2. Klaus

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    I don't know if it is normal but I had the same experience today, but I think it happened around 17%. Luckily I could get it down slowly, but in the end I couldn't control it at all and have a minor crash :roll:

    I don't know why we cant fly until the battery are nearly flat????
     
  3. Pull_Up

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    Two reasons:

    1. DJI want to give yuo a threshold in order for you to be able to get your Vision back to you, hence the two-stage warning. Stage one means "start to head on back", stage two means "I'm going to start coming down now, but can override me a little if you're still on the way". It makes sense from a safety point of view - soft landing versus plummet to the ground when you hit 3%.

    2. Lipos don't like deep discharging. If you regularly fly much below 20% you are shortening the life of that expensive battery. In extreme cases the battery could start to swell up or even burst into flames if it gets a really deep discharge. The DJI recommended "down to 8%" is only once every 20 flights...