What is the maximum theoretical power consumption of Pi 4? I had expected that I would be able to find some sort of specification table for that, but I could not. The only things I could find were third-party benchmarking results like [this](https://www.cnx-software.com/wp-content/uploads/2019/12/Raspberry-Pi-4-Power-Consumption.png.webp) which says that Pi 4 uses 7.28 watts on "Load".

But isn't 5V\*2A = 10W? Then, why do they say that Pi 4 requires a minimum 3A adapter? Is it because a 5V 2A adapter is does not actually output 2A due to some sort of conversion loss? Or because Pi 4 can use more than 10W?

Someone on the web says he recommends a 4A or 5A adapter. I could not find any 5V 5A USB-C adapter, but I could find a 5V 4A USB-C adapter. Is a 4A or 5A more recommended than the common 3A adapter? And does a 5V 5A USB-C adapter exist?