Is it powered from the USB port or does it need an external power source?
1772032
It is powered by the USB port. In fact, actual USB 3 ports have stronger power than USB 2.
1772033
Powered by USB port, no external power adapter needed. This is a very good case and is still working great for me.
1772034
Depending on what you put inside it, you might need USB 3.0USB 3.0 can supply much more power than USB 3.0And now there is even USB 3.1
1551587
The device does require external power. It cannot run off of USB or eSATA power alone. So, yes, it does plug into an AC outlet if that is what you are referring to.
1704316
It uses an external power supply. It only used the USB and thunderbolt connections for data transfer.
2113235
No external power supply on this unit. Just a regular 2 prong plug straight from the unit.
1323540
Steven it is USB powered but comes with a second USB cable to provide extra power if required. In my experience it seems to be needed. Regards John Docherty.
1143157
It is not battery operated. I believed it is powered by the USB that connects it to the computer.
1727979
It's supposed to need two USB ports to power it.source: http://reviewstash.com/viewtopic.php?id=1046
533765
It can be powered either way. A power adapter is included in the box as well.
306864
It needs a 12v external power source to work. It doesn't have internal batteries.
1436243
It is powered from the laptop itself. I plug my (Dell) laptop in (by way of 110vt. adapter) and use it, otherwise you will be draining your laptop battery pretty fast.
942013
This unit is USB powered, does not need to be plugged to an electric outlet. The computer this device it connected to will power the unit using the USB cable.
2218931
No, it is powered by a cable which is included. It plugs into a standard outlet.
973536
Well you need a usb cable, that's what powers it , once plugged to a usb source of power, it's ready
1533276
Yep, it's USB powered. It also comes with variable fan speed and the blue light looks pretty cool.
1436246
Powered by USB, whether off laptop, desktop, or direct plug with a USB port. I love it!
907288
Hi. With this device, you do not need any external power. The device brings it all included and takes what it needs directly from their computer. It works excellently. Regards. Vincent.
23300
No. It gets its power supply from the raspberry itself. No need for external power