Hi jeepik,
which phone you were using? And what cable and adapter were working with our charger?
iPhone X
Charger (using the QuickCharge 3.0 port):
https://smile.amazon.com/gp/product/B01A4ZGLZ8/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
Cable:
https://smile.amazon.com/gp/product/B00SUY0NCI/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
Something might be wrong with your charger, adapter, or cable. I have a complete opposite experience. It’s not as fast as a cable but does more than 2% in 30 minutes.
By chance, what sort of angle is yours at? Mine is near vertical so I can actually see/use the phone. My phone also seems to slide down a little after I initially attach it, and it still shifts a bit during the course of a trip.
Sarah? Any input? I got mine from you guys, via Amazon:
https://smile.amazon.com/gp/product/B077QZFS3X/ref=oh_aui_search_detailpage?ie=UTF8&psc=1