I checked and found that the DC plug of the included power adapter is 5.5/2.1mm, which is the same size as the E30 ll. The voltage also matches DC5V.Hi,
I have this adapter from my old router:
It is DC5V 1A adapter, exact specs that E30 II needs. So, using this dedicated 5V adapter would be better or should i go for a USB adapter? Thanks.
As for the remaining problem, if you can confirm that the center pin of the DC plug is positive, you can use it.