If you're picky about your USB accessories (like me), you may check if it's approved by Google software engineer Besnon Leung. He has some good news about the new Pixel 2 and 2 XL - they support up to 27W charging! For that you will need to buy a compatible USB Power Delivery charger. The phones ship with an 18W charger (same as the original Pixels) that promises 7 hours of mixed usage with just 15 minutes of charge. Imaging how much more you'll get out of a 27W charger! If you get the new Pixelbook, it comes with a 45W charger that is compatible (at a lower power level, of course)....
Source: https://www.gsmarena.com/the_new_pixel_2_phones_support_usbpd_up_to_27w-news-27579.php