I just had a similar issue with my Note 8 where I was charging for some time, then noticed the water drop at the top which indicates moisture of the screen. When I went to pull out the plug I noticed a smell and saw my plug was bubbling and smoking. Ever since my phone takes 3-4x longer to charge by usb, and always shows the message not the correct usb is being used. My wireless quickcharge take just a little over 2 hours to charge, FASTER then the usb.
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