It probably is going into charge only mode and won't work for anything else. Might partly depend on the level of battery charge. Maybe if you plug it into a USB3 or a type C port on your PC with the appropriate end for your Edge 530 it might allow you to work with it. USB 2 only puts out .5 amps on the power pins. USB3 is a tad better with .9 amps. So maybe it still won't be enough. If you have a type C port on your PC it should put out plenty to run the thing.
Regardless, if you need to charge your Edge, it will be very slow to charge with a PC or Macbook unless you have that USB type C port.
Sometimes USB hubs will put out a tad more amperage on the ports if you have a powered hub. But if it's just powered from the USB cable it'll be only able to put out what the PC puts out.
Last edited by Iride01; 01-07-23 at 03:07 PM.