What we need is called a 'USB-C PD trigger', a little board that negotiates a specific PD voltage with a charger. It should be possible to hack together a USB-C charger for my cheap Chromebook! Indeed, 12V is an option, and at least a couple of my chargers support it. USB traditionally delivers 5V of power, but with the introduction of the USB Power Delivery standard, devices can negotiate higher voltages with capable power bricks. Instead, this laptop charges from an old-school 12V barrel connector, forcing me to carry around an extra brick. Only one thing won't charge with USB-C, my awfully cheap ($190 for 4GB of RAM) Samsung Chromebook 3, a machine I use when I want the extra security of the Chrome OS platform. USB-C chargers around the house, USB-C PD power bank, even a nice small USB-C dock that works with the Nintendo Switch if the charger can do the right voltage.

The other day I threw all other cables into a box, and bought a set of USB-C to USB-C, Lightning, and microUSB cables. Hacking together a USB-C charger for a cheap Chromebook

Google chrome book charger