I've smoked two wall warts because of trying to use a dodgy USB-C cable to charge a 2015 Pixel. In one case, the wall wart sim[ply stopped charging. In the s

I've smoked two wall warts because of trying to use a dodgy USB-C cable to charge a 2015 Pixel. In one case, the wall wart sim[ply stopped charging. In the second case the wall wart started charging my Nexus 6 REALLY FAST on one port and the other port has gone dead. I haven't had a chance to check it out with a volt meter, but I suspect it's now putting out substantially more than 5V on one port, and substantially less than 5V on the other. Fortunately the N6 supports Quick Charge 2.0, so as long as the voltage wasn't more than 9V, it probably didn't do any real harm to the phone (although it was actually charging faster than my normal QC charger). But since I also noticed the phone getting really hot, I've stopped using that charger, and it doesn't look like I've significantly damaged the N6 batteries. At least, the battery life hasn't been compromised and it hasn't burst into flames. Yet. :-)