Is there a power bank that I can power the gl-atx 1800 via USBC?
I just joined the "community" 5 min. ago and when nosing around saw your post. Last night I powered the atx1800 with a, may I say crappy Canadian Tire power bank. It is rated as 5v 2.1A. It kept the router going for about 5 hours. I think any reasonably decent PB will do.
Any power bank that has at least 20W output. You can get away with 12W, but once you start loading CPU and WIFI, wattage demand will go up. So to be on the safe side and avoid any power issue, a power bank with 20W output is highly recommended, on USB-A or USB-C port.