How to insert a power button on Arduino Nano I've an Arduino Nano to which a Micro Servo 9g is connected. The Arduino board and consequently the servo are powered by a USB powerbank connected to the board with a USB mini cable.

My question is: Is there a way to insert a power switch so I can turn on/off the board without plug/unplug the USB (that now is the way I use) ?
I was thinking to cut the USB cable and work with the positive of it but if someone has an alternative or any tips I'd really appreciate it. Thanks!

EDIT: If is needed I could make a wiring diagram.
Cutting a usb wire would be the easiest. Otherwise you'd have to cut traces in the pcb and attach wires. Not recommend for beginners. You can actually buy usb cable with a switch.

Another alternative would be to put the microcontroler in sleep mode and have it use very little power.