does it require any external power ?
474735
No, I draws its power from the mother board. You may be thinking of USB hubs, which often require external power. Hope this helps.
474736
it gives u usb 2 ports. i wouldn't try to run hard disks from these ports, the only power is usb power
1551652
No, you don't need it. It works with the power suministrated by the usb cable taken from the PC, Laptop, iPad or iPhone.
636387
The unit does have an external power supply. Unit works well, no complaints here.
2149585
No. The unit is powered from a permanently sealed battery with 10 year life and cannot use external power, so there would be no point in doing so.
586146
No, it needs a power source. Ac/ DC connection. No headphone connection either
509896
No, none is needed,it is powered through the USB connector, which can be connected to the host computer or via an AC to USB adapter if no port is available on the computer. A USB data connection is needed for initial setup (password, etc.) but not for operation.
1729850
it does require outlet power but it can run off of battery - but there is no other sign of a camera
785028
Does not need external power supply BUT if your HDMI cords are the longer variety it will definitely need externaml power.
206049
It has and requires an external power supply. I purchased this particular external drive because I needed an external drive that had its own power supply to get files off of an old laptop computer that only had USB 1.0 ports. USB 1.0 ports are old technology do not provide enough power to an external drive. It was by far the easiest way way to recover and save those files to use this self-powered external drive. There were other ways, but this was a simple solution for me. Moral of the story is that a separate power supply is not always a detriment.
765901
Not necessary. It has an "Auto-off" feature, so you can leave it plugged in.
95049
Yes. The manual clearly states that external power is required at all times. USB 3.0 ports are supposed to provide up to 900 mA, each, so requiring an external power source for hubs is pretty much written in stone.Also, it is worth noting that older computer systems probably do not have USB 3.0 ports built into them. My own laptop is a 2011 ThinkPad, and I had to buy an adapter card to get the support.
2000271
This item doesn't require any external power connectors; it only draws power from the PCI Express slot. Hope this helps.
458955
No. The power adapter is only needed if the devices connected to it require more power than the port on the computer can provide.
10476
It does not provide power to any device. It is powered but does not provide power (other than through the USB ports)
2275281
I just tried this and yes it will continue to work with no external power as long as the batteries are good. I started it and unplugged the power cable and it just kept going.
1346326
There is no external power button. A shortcoming for sure, but what I did was set my computer to startup at a specific time each day in the schedule settings under power control in the system preferences.
87592
Yes, this needs usb power to function at all. You don't have to use the sound, but usb is always necessary.