As many others im getting a Zero W for PiHole and i would like to power it using the usb-port of my wifi router. However, im concerned about undervoltage. I read the Zero W wants 1,2A, but usb 2.0 only has about 500mA or so. Without a screen i wouldnt recognize the Pi getting undervoltaged.
Does it really consume that much? The Zero wont get any active coolers, displays or leds.