I haven't tested it with an OEM charger but I think the speed may change depending on the wattage of your power supply. Charging doesn't feel particularly slow and the USB port on the side works. The case on my device looks cheap, the USB port is difficult to use because the tolerances are too tight. I bought a USB-a to USB-c adapter and haven't thought about it since. We also recommend purchasing a right angle USB cable, otherwise the underside of the cable head may rest on the table.
π Nicpower 65 Watt USB Type C 4X20M26268 AC Charger for Lenovo ThinkPad, 20V 3.25A Type-C AC Adapter
8 Review
π 24W 15V 1.6A Charger Adapter for Surface Go/Go 2, Surface Pro 4 Core m3, Surface Pro 3 Core m3, Surface Pro 2017 Core m3, Surface Laptop Core m3 - Includes Travel Case
8 Review
π‘ KINGDO Surface Pro Charger 36W - Compatible with Surface Pro 3, 4, & 5 - Including Carrying Pouch
9 Review
π High-Speed 6.5 Ft UL Listed AC Adapter for Quick Charge of Hd Hdx 6" 7" 8.9" 9.7" Tablet and Phone Tab Power Supply Cord, Compact Portable Travel Charger
9 Review