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Bypass P2 Battery Can be done…

Discussion in 'Phantom 2 Discussion' started by RCWatchman, Sep 4, 2014.

  1. RCWatchman

    Dec 10, 2013
    Likes Received:
    I had been posting to get help and info on how to bypass the Phantom 2 battery. It is almost impossible with out using the board inside the battery but if you are willing to sacrifice a battery you can use the board once rewired to generate the pulses needed to fire up the motors on the Phantom 2 and use any 3 cell you choose for the raw power.

    The board when activated also can be used as switch to control the negative leg of up to 5200 mAh battery (that is what the stock one caries)

    Once it is wired you just plug the pigtail into the balance lead of the battery you are using and it will come to life, if you give it the two sequence hit in the momentary switch. It seems once you power it up, if you just remove power without hitting the switch it stays in that mode and will light up once it sees power again. I have the signal needed wired to a JST connector for easy disconnect.

    I tested it, it works and now I can get back to finishing my Hexo-Phantom. It will carry 2 5200 batteries.

    PS. The picture shows heavy black wires, that is the switch leads. I am going to use this board to charge the batteries as well. You need this switch in circuit to shut off the charging process once complete.

    Fly safe…

    Attached Files:

  2. witold

    Jun 26, 2014
    Likes Received:
    I'm curious to see if there is a better battery out there than stock, with the goal being more air time.
  3. ElGuano

    Sep 4, 2013
    Likes Received:
    IIRC the last time someone did this mod, the smart board retained the total current recorded from the last charge, which is used to trigger the low battery alarm (and autoland). Have you tested to ensure that the new 3S battery you hook up to it doesn't need to be cycled and charged to reset the current counter?
  4. ussvertigo

    Jan 28, 2014
    Likes Received:
    South Georgia
    I have been wanted to convert P2 smart battery cap to plug in cheaper external batteries when not making video. Can you provide a more detailed drawing or ie so I can try this? I can't figure it out with just supplied pics, like why are the six orig cells still attached to the lower circuit board, shouldn't they be removed? thanks cap
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