Hi,
I haven't find any charging data for the Instinct. I don't know how many amps and volts you can charge it with. I have two USB charging ports on my computer and one of them charges my phone about 3.45 times faster. I tried charging my Instinct from that port and it charged VERY fast. When I stopped charging it reached a temperature of 40 Celsius. I'm afraid that it might have damaged the watch. I does not seem like it, but what do you think? Should I charge it from the slower port instead?