power to devices does anyone know if this supplies power to devices when *not* connected to a computer?
862931
no worries I just looked to see if it used more power when plugged into its cord and the opposite was true . Its Hot- Swappable so you dont have to turn your computer to change at first it seemed cheap but Im glad I listened to my friend who so happy with hers and if you plug it into the wall it wont send power to anything thats not on in fact you should have nore hours in the end of use without needing power
2218700
I have no idea, but I would think not. The device simply gets power from the USB port. It does not interact with the computer at all.
594050
No. It does not provide a connection any devices. It will however use POE if available which will eliminate the need for the power supply.
189157
It does not have a power switch. I want to say it does draw power when there are no devices connected, but not sure.
862202
It works without power supply when attached devices have little power consumption but peripherals such as an external hard drive that draws power from the port requires the added boost of the external power supply.
1518583
Yes, it is powered through the computer and does not have it's own memory. If you have a tablet of some sort with a regular usb port, that might make itn more portable.
836519
Hello Susan. No, it isn't it needs to be connected to power. It's very nice but I don't consider it portable.
2098322
Yes. Keep in mind though that you'll probably need to use two USB cable spots to power the device. It's unusual but works fine.
1747603
I do not see any indication that it does, it doesn't offer any power once unplugged and I cannot see any other reason for it.
1554831
I don't believe it does. It only delivers power when something is plugged into one of the ports.
335687
It will not power devices. The ports will be for data transfer only. They don't put out enough amps to power devices.
374663
Mine doesn't. It still provides power until the device stops requesting it. It would waste power. If you want to see the status, just click the button again.
577168
I only use it with external power, but I believe I recall reading that it can not be powered by USB.
793143
I can't imagine it powering a laptop, don't laptops need way more energy than an iPod or cell phone? I wouldn't recommend trying it.I would say it's a REPLACEMENT for powering off a laptop.
831936
No, power is only needed when using items that exceed your computer's usb maximum millivolt output.
2043710
I've never tried connecting it to a device via USB, and my understanding was that it was only for power.
1789466
Karl, It doesn't use much power but I would recommend that you disconnect it when you're not using it. I've read statistics about the enormous amount of energy we use worldwide by not disconnecting the millions of devices like this. I use a power strip for my stereo, TV (it stays semi powered up if plugged in), and other devices. I just flip the strip off and everything connected to it gets shut down. The power strip may not be possible for you (or overkill) but I would disconnect when not in use.