Proprietary format device charges are the worst. My original ASUS Flip C100PA-DB01 Chromebook had a proprietary charger. Locating that charger became problematic today. The charger has gone missing. It cannot be located. That meant it was either time to buy a new charger or to buy the ASUS C101P and upgrade. Finding the right upgrade path was easy enough. The ASUS C101P has USB-C charging capabilities and that is enough to make things easier. I’m going to use this device for about a week and then write a review.