New XPS 13-9380 USB Type-C charger. XPS 13-9380 is plugged in. Light on the *cable* is on. XPS 13-9380 charges. Some time later, the light on the cable turns off. XPS 13-9380 stops getting power of course. Stays this way for hours (over night). Unplug the charger (at the wall) and plug back in, and it lights up. So seems not a software thing. Is this a faulty charger?
To be clear, you are plugging the AC power adapter into the left side #2 port? Are you saying that the battery charge is dropping to 0%?
Plugging into #2 - correct.
Laptop charges up just fine. I leave it plugged in, make zero changes.
At some point, the light on the cable turns off. Laptop stops getting power.
If I leave it like this, yes, eventually laptop battery would run down to 0.
I'm leaving it in overnight, and expect it to remain fully charged up of course.
If I just unplug the power adapter from the wall, and plug it back in, light comes back on, power flows again.
What is the status of the AC adapter & Battery in BIOS when the light on the adapter goes off or when it stops charging?
Does it say plugged in not charging or not detected?
Does the secondary port on the right, charge the device?
Does the light on the adapter cable turn on if you unplug & plug just on the notebook & not on the wall?
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