Looking for the ciruit card inside the battery

Discussion in 'Walkera Voyager 3' started by gjinc, Aug 4, 2017.

  1. gjinc
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    gjinc Member

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    I had one cell go out on the battery and while messing around I might have damaged the circuit card.
    Does anyone have one they want to get rid of?
    Thanks
     
  2. bjr981s
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    bjr981s Moderator Staff Member

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    I don't believe that the battery cells are user serviceable. I have found I cannot match the correct MAH, C rating, Dimensions , weight on any of the so called Walkera Smart batteries.

    A member might have a dead battery with an intact CCT board but I think the issue would be mute.
     
  3. gjinc
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    gjinc Member

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    A empty battery case with the circuit card intact would even be better.
    first of all i would just like to replace my circuit card.
    Inside the battery case is the circuit card and 2 batteries, I already replaced the bad one.
    I cut open the plastic on the bad one and got a bit careless, one of the contacts touched the circuit card.
    There is a electrical burnt smell, more on the battery than the card. But since it seems like it is not charging correctly
    i am thinking something on the board got damaged.
    I'm still trying out a couple of theories.
    2nd there is a way to replace the separate batteries, however supply is still a problem.
     

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  4. bjr981s
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    bjr981s Moderator Staff Member

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    The CCT card plays no part in the battery charging as far as I am aware

    It just drives the LED display and acts as a ON / Off main power breaker.

    The Batteries are 2 x 8S in parallel to get the output C rating required.

    They have their balance leads connected in parallel to go to the charger.

    If you had a dud cell when you tested it, it would have the same cell damaged in both battery packs.

    If you are having charging issues (It most likely will not balance?) it may be because one cell in parallel (the other pack from the one you changed) is also damaged.

    You might have also cooked that other cell when you shorted it out.

    Cheers Brian
     
  5. gjinc
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    gjinc Member

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    When I connected the charger to the whole battery in the case I only got 1S-7S lights to come on.
    When I opened the case and disconnected one battery at a time, one battery all 8 lights came on and one battery only 1S-7S lights came on.
    I replaced that pack and put everything in the case and all lights came on.
    So I will have to disagree that both batteries have cell damage.
    The batteries were not connected when i touched the one to the board.
    Where I am at right now is that both packs have charged individually off a different circuit card.
    I am now testing to see if they will charge as a pair
    cheers
    P.S.
    If all the card is for the LED's and power distribution, then I most likely did not damage the card.
    I would still be interested in a empty case with the circuit card.
     
    Last edited: Aug 5, 2017
  6. bjr981s
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    Sure no problem. I have had experience in trying to repair Phantom 2 batteries.

    I have found that when one 1 cell goes in a pair it drags the other cell down and causes over discharge that damages the good cell.

    Cheers
     

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