If anyone is interested, I updated the script (linked in this article) to check if your Raspberry pi power supply and cable are good enough:
https://bia.is/2019/02/02/raspberry-pi-check-your-power-supp...
https://bia.is/2019/02/02/raspberry-pi-check-your-power-supp...
’wget -O - https://gist.githubusercontent.com/maxme/d5f000c84a4313aa531... | bash’