Can this unit be used without the power adapter and the power adapter only used when needed to provide additional power to devices on the hub?
1302299
I can't be sure, but I would assume it would work unpowered. Every hub I've had did.
1302300
Depends on what devise you have plugged in. A usb stick should work without the power cable, external drives would not.
1302301
Don't know. Its used at a Club (off site) but where others failed to connect 3 KeyPads with long extensions, this unit has worked flawlessly. I can test next year!
1302302
The USB 3 adpter needs the extra power as the standard USB for most PCs are USB 2.
1302303
YES it can, (even with USB3 HDD)if you don't need the extra power you don't need the power adapter.
1255035
The hub can be powered by the AC adapter and or USB. I have one and I use it to dj. It is nice because if my computer looses power my controllers stay on because the hub is plugged directly into the wall. Don't get the USB 1.0 version I have it and it is terible. I went back and bought the 3.0 and it works great. I run a USB powered light of it so the on off switches are nice. Hope this helps.
1140718
USB ports can only supply limited DC power. Sometimes a two or three port passive (no power supply) USB hub can be useful, but don't expect a seven port hub to operate without a separate power supply. If you're inventive, you can construct a battery power supply with parts from Radio Shack so that you can occasionally operate away from utility power.
636386
It does not have a power on off button, USB hubs I have had in the past with power adapter did not have a power button. you need to plug in the power adapter and it will remain on till it is pluged in to AC, if you disconnect the AC adapter it will function as a normal USB hub but will not be usable for charging devices that are power hungry. You could still charge cell phones or smaller devices. Hope this clarifies.
1694990
Only if you want to provide power to a USB device that you plug into the hub.
2028567
In most cases you don't need a power supply as the unit gets its power from the devices plugged into it. The instruction manual indicated a power supply may only be needed if using very long HDMI cables.
2043310
The manufacturer says this: When the hub's power adapter is not connected, the hub is capable of running purely from bus power (from the host PC). When a hub reports itself as bus powered to the OS, the OS looks in the USB descriptors for every attached device, sees how much power the device reports that it needs reserved for it, and pops up a error (and possibly disables devices) if the total amount of power requested exceeds what a bus-powered hub in theory can count on pulling, which is 500mA for USB 2.0/1.1. We recommend always using the power adapter for best results.
23300
No. It gets its power supply from the raspberry itself. No need for external power
1800550
No you have to use the power adapter supplied. Unless you rigged up a 12 volt DC battery near it.
594082
You need to connect the AC power to power this 7 port hub. It come with the unit.
2270232
No, this item is not able to be used without the power plug for now. But we will release one with a battery power supply in the near future. Thank you for your kind attention.
1519019
Depending on the drive.. Some smaller (2.5", 1.8", etc) drives enclosures require no additional power and if they are capable of using a single (or sometimes dual) USB ports for operation, you will have no trouble using them with this hub. However, larger drives (3.5") enclosures must be plugged in to external power source (they usually come with power adapters). For those you will not be able to operate them with this hub only, without external power source.
133051
Mine works with my Powered hub, but I have to unplug it when I boot or reboot as it causes the boot to hang.
625580
No, it doesn't need a separate power supply, it can draw the power from USB port on a laptop. If you intent to connect it to an USB hub, make sure that the USB hub can provide sufficient power. Non/low powered USB hub will not work.
509068
I purchased one of these and was happy. The cable can be used to setup the unit, and you can setup anywhere convenient. After it is setup no need for the cable. And yes, it came with the power adapter ready to use.
830654
Yes, I have two power strips and my UPS plugged in to mine. There is only on AC outlet on the unit so you would need a power strip or adapter.
1915576
I don't know if it'll work with out the ac adapter. I do use it to run a Raspberry Pi, without any other power source so I would assume yes.