I have the KdLinks A400 Version of the Q10-Pro, Ever since day 1 I have noticed while transferring large files to/from the internal HDD my airmouse will lag and or lock up intermittently, Also when trying to run apps/tasks while the transfers are in the background you experience the same, I recently added a Sunba 405-D20X PoE Security camera to my home ( Killer cam by the way see you-tube videos )
The camera came with a nice 12v 4amp PS I did not need to use, Turns out it's a direct fit, All of my issues with the Q10 Pro are gone, I even noticed using Mx Player or the internal player to access media on the HDD it is twice as fast as before, Do your research a 3.5 HDD under full load takes as much as 1.7 amps, That does not leave shit for the Q10 to function properly, Transferring files or watching a movie from the HDD at best you have 5-600 Ma left for the box itself, Thats just insufficient, Do yourself a favor and grab yourself a 12v 4a supply you wont regret it !
As far as electronics go as long as the voltage is correct the amperage does not matter over required specs, You could have a 12v 40 Amp supply and it would not matter, A device only pulls the amps it needs and no more, Under amperage however blows cheese !
I AM A LICENSED ELECTRICIAN BY THE WAY !
Derek.