Close. You've posted a pic of the female connector. You should need the male connector to plug into a power bank.
Upon checking the inside of my empty Aeon hilt, that connector barely fits, but would be forced into the narrower area where the lower choke point is on the hilt. There's enough room below the switch area, but that 2.1 cm width of the usb terminal worries me a bit. I don't have either or the parts to dry fit this idea, the usb terminal or the power bank, so I can't be sure they both will work.
This also limits the choice of power bank because the usb to be wired into the hilt would be forced into the center line, so the power bank would need the connector to be in the center also., No off-center usb on a power bank would line up.