First install powertop and TLP . We use powertop to estimate power usage when unplugged and TLP to run as a service

sudo apt install powertop tlp

I then did a little tweaking in my /etc/rc.local

#!/bin/sh -e

# Temp disable bluetooth
modprobe -r btusb

# Autosuspend USB Razer Keyboard after 5 minutes 
echo '300000' > '/sys/bus/usb/devices/3-8/power/autosuspend_delay_ms'
echo 'auto' > '/sys/bus/usb/devices/3-8/power/control'

# VM writeback timeout
echo '1500' > '/proc/sys/vm/dirty_writeback_centisecs';

exit 0

Lastly switch from NVidia GTX 1650 to the Intel Iris Pro

sudo prime-select intel

After this my power usage dropped to as low as 1.6 W when Razor Turns off or 3.6W while typing this

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