I am out of the US and I couldn’t find the 5V-2Amp power supply over here. However, I have a power adapter that has an output 12V-2A MAX and 100-240V ~ 50/60 Hz. So does this power adapter work for my Jetson NanoDeveloper kit?
Unfortunately, your power adapter does not recommended by Nvidia. You can check the recommended power adapters fom this link.
Please refer to the devkit user guide to choose adapter. Jetson Download Center | NVIDIA Developer