Charging a XPS 13 9360 with a USB. C cable.

@Jlgale  In terms of the power source recommendation, I use this amazing multi-purpose charger whenever I travel.  It has a 60W USB-C port for my laptop, an 18W USB-C port that can charge my iPhone at its fastest supported speed, and then two USB-A "regular USB" ports.  This single charger allows me to charge my laptop, iPhone, and watch every night, and then I have one more USB-A port left over for either my AirPods, USB power bank, or work Bluetooth headset, neither of which need to be charged every night.

And then in terms of cables I keep the following dedicated to this charger and always packed with it:

• A 10-ft USB-C cable for my laptop (I like having extra slack so I don't have to drag the power brick around with my laptop)
• An Anker PowerLine Lightning to USB-C cable for my phone
• A Lightning to USB cable for my AirPods (or my iPhone if I need to use the other USB-C port for something else, like a USB-C power bank or my Oculus Quest)
• An Apple Watch charging cable
• A micro USB cable for my power bank (which will become a short USB-C cable when I get a USB-C power bank)
• A female USB-C to male USB-A adapter (if I ever need to charge a relatively low power USB-C device from a USB-A port because the other USB-C ports are occupied)
• A male USB-C to female USB-A adapter (in case I want to use one of the USB-C ports as a third USB-A port)

It's an awesome setup, totally flexible and covers everything I need.  If you want a bit more power, this newer version includes a 90W USB-C source.  It's not necessary for your XPS 13 of course, but if you want a bit more power for futureproofing and don't mind spending a bit more and having a slightly larger device, you might want to consider it.

I'm a big fan of Anker myself, but unfortunately they don't make multi-purpose chargers quite as powerful as these Satechi products.

@Jlgale  That might work, but it would be a bad and unnecessarily complicated setup.  The USB-C to DC cable is designed for when you want to use a USB-C charger with a laptop that doesn't support USB-C charging.  The XPS 13 9360 supports being charged through its USB-C port.  But it's also designed for a 45W power source, so if you have a charger that only provides 30W from its USB-C port, it will complain about an undersized power source and you'll see slower battery charging and possibly reduced performance.

So get yourself a power source that supplies at least 45W from its USB-C port and then just a regular USB-C to USB-C cable that supports USB PD up to 60W (which is standard, no need for a USB-C cable that supports up to 100W since again the XPS 13 only requires 45W).