All laptops have this vulnerability, as also do non OEM chargers using the Surface Connector.
Here is a quote from a DELL laptop support website:
The temperature gets really high with a USB-C dock/charger plugged in and no CPU usage. Its very very hot to touch and my measurement suggests close to 65C in the hottest stop.
Can someone from Dell confirm if this is OK? Is there a BIOS fix coming for this? I don't think this is normal and it will ruin the battery/electronics around this area in the long run.
A DELL charged this way burned up the motherboard.
The fact that it happens in lots of machines from different manufacturers doesn't excuse it. If the traces on the circuit board are so small as to be unable to reasonably handle the current that the machine may be expected to draw, then it's
bad engineering.
Granted that I worked in software, not hardware, but when I was an engineer, we designed our products to deal with user-imposed stressors.
If a port is advertised to be used for charging and the cable can carry the current that the machine demands, then it behooves the people designing the portions of the motherboard that will carry that current to do so--or, in the event that they can't do it because the machine "has to be thinner," or something, to object.
There's no reason that a manufacturer can't say "This USB-C port doesn't support power delivery." In fact, I own a machine in which one of the ports
is so designated. If you're going to implement USB-C charging then you ought to do it right. As the Dell support question you quote points out, this kind of heating "
will ruin the battery/electronics around this area in the long run."