1. GRAB A RED WRISTBAND AND PUT IT ON. Use this as a reminder to not leave your battery unattended

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  1. Battery Charger plugged into wall. This one has a balance lead breakout for batteries from 2s-6s (2 cells vs 6 cells in series). On the right is the standard 3s LiPo used for stinger Tug

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  1. Pictured is the pinout for the GensAce IMARS D300 battery charger
    1. This charger is capable of dual battery charging; it has Ch. A and Ch. B charging channels
    2. The ground pin for your battery (and balance port breakout) must all be connected for correct balancing. *Black wire go to - symbol on charger

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  1. Plug in the balance lead into the correct slot for your battery size. JSTs are keyed so it should only plug in one way

    1. You should see the cell voltage of your batter pop up on the screen. Cell voltages should generally be within .1V of each other

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  1. Place your battery into a fireproof LiPo bag THEN connect power into the battery charger

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  1. Here we see the two channels. Press the square button twice to select Ch. B

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  1. Press the circle button to select a task for Ch. B

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  1. Use the arrow keys to select Charge Task; the correct battery type: (most often LiPo); target voltage should auto populate; cell count should auto populate;
    1. Target Current is calculated by: (Battery Capacity) Amp Hours x C - rating
      1. C-rating is measure given by manufactures to indicate its discharge and charge rate. Since we use a lot of cheap LiPos for drones many batteries are given very high C-ratings as they are capable of delivering lots of current. *A cheap battery may have a higher C rating than a more expensive brand-name battery. But if supplying the same loads the more expensive one might last longer due to better cell construction and general manufacturing.
      2. For Stinger Tug this is 1.8Ah x 45C which would be a crazy charge rate. This is just a result of C ratings being very loosely regulated. If I am feeling nice, charge at 1A, but charging at 5A would also be okay.
        1. Charging at higher current can make bad things turn worse. An incorrectly connected battery will more quickly puff up and turn to flames if it is being supplied 5A vs 0.5A.