I ran it down to 12% percent. After 30 mins I was at 64% and it was back to 100% about 30ish minutes after that. This is using an Anker QC 3.0 powerbrick and their 3ft powerline usb to type c.

this one

http://www.amazon.com/Anker-PowerLine-Resistor-Including-ChromeBook/dp/B01A6FDP6O?ie=UTF8&psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00