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Thread: Charge lipos by feeding the charger with another lipo?

  1. #1
    Join Date
    Dec 2021
    Location
    Mi
    Posts
    3

    Default Charge lipos by feeding the charger with another lipo?

    Before I had no problems charging but now with the RC and flying in the middle of the field I have been forced to charge batteries by pulling the car's battery and I didn't like it (I don't want to screw it up).
    I had thought about charging the 6s 5500mah lipos from the boat and using them to power the charger and charge those from the boat. Has anyone tried something similar?
    I can configure the charger so that when the input voltage drops to 22.5v it cuts off and thus the 6s lipos would not suffer.

  2. #2
    Join Date
    Jun 2011
    Location
    FL
    Posts
    789

    Default

    I look for DC input ratings of 30V so I can use 6S or less lipos for charging. Put a little low V alarm on the battery or monitor it. By the last heat at a race I like to move current around so I can take home most of my cells below 3.85v
    Mic

    Mic Halbrehder
    IMPBA 8656
    NAMBA 1414

  3. #3
    Join Date
    Feb 2019
    Location
    NY
    Posts
    385

    Default

    Why not pick up something like this. https://www.grainger.com/product/54D...B&gclsrc=aw.ds

    My Jeep came with a built in inverter . I can plug in pretty much anything into it . I haven't tried a lipo charger yet.

  4. #4
    Join Date
    Aug 2021
    Location
    FL
    Posts
    325

    Default

    Yes, you can use your lipos to power the charger, if both are capable and compatible, and you monitor the 'donor' voltage.
    Been doing it for a while.

  5. #5
    Join Date
    Sep 2020
    Location
    Tx
    Posts
    286

    Default

    I do that every race day. I use a Hota D6 Plus as my field charger, which is capable of up to 30vdc input. I have two 6S 9500mAh LiPo's I got on a Black Friday sale for cheap, I use them in parallel to power my charger at the races. I can take 4-6 boats out there, and recharge each boat multiple times for multiple races/test runs without having to be tethered to an AC shore line. It works great for me!

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