I have been using a few power adapters came with my Samsung phones. They are all 5V 2.0A otg adapters. Then I also had a couple of power adapters which were given by a phone store. These are not made by Samsung nor anyone well known. However, I found out that its specification saying 5.0V 2.5A OUTPUT!!!! Wow, I was just checking to see if they provide 2.0A, but now I have two microUSB power adapters providing 2.5A!
Immediately, I tried the adapter on my BPI-M3. It seemed to work fine. Nothing blew up. I just wanted to make sure nothing becomes too hot. Actually, USB-SATA bridge chip was somewhat hot after I connected SATA HDD.
With 2.5A power, the board was pretty stable even with SATA, HDMI out, and USB devices.
I don't know if we can say that our power issue with M3 is at rest now if we use 2.5A adapters yet. At least it is working OK for now. I am planning to run for awhile and find out unless SINOVOIP comes up with something better.
I am trying to backtrack to purchase many of these 2.5A adapters for now.
I will re-post again about this... Thanks!