Where to buy (usb micro B - usb 3.0) - Y cable?

Question

USB

I wanted to connect an external screw to the router with usb 2.0, usb 3.0. As soon as I connected it, the router went to rebut instantly. It is clear that there is not enough food. As I understand it, you need such a cable: I

have only found this one on Amazon so far.
And where is it sold besides China?

Answer 1

If the router went into reboot, then the protection for the power supply at the input worked, and not for the USB port - then the screw itself would simply cut out. So such a double cable will not help. Need external power.
I do not consider options with kernel crash and watch-dog work.