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Maxwellfire on PRT-11231 - Power Cell - LiPo Charger/Booster

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I plugged my lipo battery into this, and the inductor in the upper left corner started to get so hot that it melted the plastic coating on the board. I quickly unplugged the battery. After measuring with a multimeter, I discovered that the positive and negative of the connector on the board for the battery were shorted together. The battery did not get hot though, only the inductor. What could I have done wrong? Help please


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