Problems with 80w fast charging (opens in new tab)

Just bought the phone over the weekend. I wanted to test out the 80w fast charging. Luckily I already owned an iniu 25k mah 100w power Bank. It's has 3 ports; 18w, 45w, 100w. It also has its own cable that attaches to the unit. When I use the 45w port to charge my Motorola fold I get a 2%...