USB is intelligent. The device should draw as much current as it asks for. If the device is not detecting any host to do any data transfer with, then it is probably idling at lowest unit power load. I would bet it’s not bad for it in any way. As long as that power brick lives up to the standard.
It’s part of the standard. It’s slightly different for each USB verision. USB 2.0 starts at 100mA at 5V and the device can negotiate up to 500mA, if the host can deliver.
USB is intelligent. The device should draw as much current as it asks for. If the device is not detecting any host to do any data transfer with, then it is probably idling at lowest unit power load. I would bet it’s not bad for it in any way. As long as that power brick lives up to the standard.
That’s how it works in general tbf, with a few exceptions like leds
Is that part of the USB standard or just common with many devices?
It’s part of the standard. It’s slightly different for each USB verision. USB 2.0 starts at 100mA at 5V and the device can negotiate up to 500mA, if the host can deliver.
Usb is 5v standard, it can negotiate something else, then it’s called usb-pd