Been looking for a power bank recently as heading overseas in a few days and this one you can get walking into Big W.
Don't know too much about the brand but seems to have a few positive reviews online.
Seems a good price for brick and mortar store for a 20,000 Power Bank.
Hard to really tell what the maximum W output is across all ports, the only information it specifies is "18W Fast Charging" which I assume is on the USB C port