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    Note: this is the PH2.0 ONLY version.

    What is it and what it do?

    Are you sick and tired of cheap 1S lipo chargers with limited functionally and often inaccurate calibration?

    Do you wish you could use your good 4/6S charger to balance charge/uncharge/storage or even check internal resistance?

    Well me too 😄

    That’s why I designed this balance charging board that would allow doing just that!

    And unlike the dumb balance wire looms that only work when all of the plugs are used,

    I’ve added a jumper so that you don’t have to populate all 6 ports to close the balance circuit.

    Just place the jumper the number of lipos you’re planning to charge and that will make it a 1 to 6S lipo to your charger!

    How is it made?

    With love of course...

    But also with the most rigorous standard for safety and quality.

    • The PCB board I designed from thick traces, copper filled on both sides for thermal dissipation
    • The VIN and balance leads are assembled from 100mm, silicone wires, and genuine Amass XT60
    • The jumpers are encased in a custom-designed, 3D printed connector that keeps foreign objects away, and forbids the bravest of you to attempt plugging the lipo in the wrong place
    • And the assembly performed by yours truly, with testing on each unit.

    In other words, I’ve ironed down every detail with the help of valuable community feedback to bring you the best charging device for your whoop lipos

    It is not a hastily tossed together cash-grab.

    It is the result of several unsatisfactory iterations, samples and prototypes that I wouldn’t offer if I wasn’t 100% happy with.


    Customer Reviews

    Based on 13 reviews
    Awesome for 1s batteries

    This board is just awesome. I tested it on 4 1s lipos. I was able to storage charge them on my charger as a single 4s battery. Before I had to just run my drone to discharge them.

    Fractal Engineering Whoop Balance Charging Board

    Amazing 1S charger, finally 1S LiPo's get some love !


    This thing is amazing! Love that I can finally storage charge my 1s batteries! I paired it with an iSDT 608AC charger, and it’s a massive upgrade over the little USB chargers. I can’t imagine not using this thing. I love that I don’t need to worry about charging batteries at a similar voltage (like you would with a parallel board, or else you risk overcharging and starting a fire).

    Also Yves, the founder of Fractal Engineering, is super responsive in his site’s chat and answered all of my questions really quickly, despite a huge time zone difference.

    FYI- I was seeing somewhat “high” numbers for internal resistance, but it’s likely a limitation of my charger only being able to measure IR while charging, and 1s batteries tend to have a higher IR than their 6s counterparts.

    I regret not getting this board sooner! I completely underestimated the damage of storing a fully charged battery. If I had been using this from the beginning (instead of the USB chargers) it would have paid for itself by now.

    I consider it a must own. You won’t regret it!

    So far, So good

    Good to have a device that I allows me to actually TAKE CARE of my 1s batteries easily. Cycled all 20 of them successfully. We'll have to wait and see about durability, but, so far, so good.

    Fractal Engineering Whoop Balance Charging Board

    Man!!!!! This charging board is Awesome!! I love the fact that I can balance charge, discharge,& most importantly storage charge an you can charge up to 6 1s Lipos or less you don’t have to fill all the charge ports. I thought it was going to be very delicate by the looks of it but it is well built and durable. I plan on definitely buying more Fractal Engineering Balance Boards. Thanks NewBeeDrone for carrying this Awesome product you guys are always on the frontline of innovation in this hobby and and you guys are carrying products that are from other innovators as well. Thanks for the quick shipping 👍😉

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