I have a problem when I connected the small motor with a wrongly wired up USB cable! When I plugged the cable into the connector, as shown in the picture, the indicator light never illuminated and a small sign of smoke appeared in the vicinity of the battery. I immediately realised something was wrong & when I tested the USB cable realised that the polarity had been wrongly assembled. Is there something I can do/check to see if it is saveable, or is the problem more likely to be terminal? Many thanks, Terry
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