It would help if you supplied the USB cable from a high-power USB port the USB port must capable of supplying at least 2A constant.
A step-up voltage cable allows a standard 5V USB power bank to power 12V devices such as modems, routers, and wifi devices. This cable is connected directly to a 5V USB power bank or port. The internal electronics will step up the voltage to 12V on the DC output plug.
With this cable, you can connect your power bank to a router. Thus, you can use your power bank to supply your router when power is cut!
What's in the box
1 x USB to DC 5.5mm 1M Cable
