Originally Posted by
tickerguy Correct.
A Type C-C cable is inherently straight through and should be fine in any event. The risk with a laptop comes when you start trying to use it with OTHER THAN a C-C cable (e.g. using adapters.) THAT carries risk. There are no phones today that have USB-PD implemented; there will be in the future I'm sure, but not today -- so today, there's a 5V@3A limit on charging via USB C-C to the phone, or 15 watts. That's slower than QC3.0 can achieve, but won't break anything.
Be careful with laptops and adapters, in short. They're ok for things like Webcams and similar but trying to use them for power purposes of any sort is dangerous, and potentially dangerous to the laptop (not just the charger.) QC chargers plugged into a QC capable phone are not at risk.