@mmarmar if you using android phone, you may try this apps called AccuBattery.

Once install, open the apps and connect the phone to usb port m9 deco

You may seen the wattage or current charge into the phone in real time.

The m9 plus device require 2Amp to operate, so you can expect it could be less than 2Amp. Maybe 1Amp or less. You can check at the back of m9 plus device.

mmarmar wrote

I have the Deco M9 Plus (v2) and would like to power a small accessory device (raspberry pi) using the USB port. I can't find any information as to how much power the USB port can provide. A usb power supply that can provide up to 3A is recommended for the raspberry pi 4. Can the USB port on the M9 output that much current? Thanks!

mmarmar wrote

I have the Deco M9 Plus (v2) and would like to power a small accessory device (raspberry pi) using the USB port. I can't find any information as to how much power the USB port can provide. A usb power supply that can provide up to 3A is recommended for the raspberry pi 4. Can the USB port on the M9 output that much current? Thanks!

mmarmar wrote

I have the Deco M9 Plus (v2) and would like to power a small accessory device (raspberry pi) using the USB port. I can't find any information as to how much power the USB port can provide. A usb power supply that can provide up to 3A is recommended for the raspberry pi 4. Can the USB port on the M9 output that much current? Thanks!