does it power the laptop as well, or you still need to keep the laptop plugged in with its own AC adapter?
2020911
No. The VariDrive does not supply power to the laptop. However, for certain functions the VariDrive can receive power from the laptop through a USB 3.0.
2261998
I suppose that it supplies power to the drive. My guess is that the laptop drive I'm using only needs 5V and that it is getting enough current from the USB port. I do not know how much power is really needed or if this usage is correct; I just observed that it works for me.
1100998
Yes, it will power itself from the adapter when plugged in and from the battery when it is not.
906934
If you can take the battery out and run your laptop on just the power adapter - the battery is dead.My battery only lasted 5-6 months. Initially I got 3 hours on a charge - no more.
1446522
It is powered by the USB port on your computer. There is no AC connection to worry about.
1221793
...the unit charges at 18.5 volts.....as long your device being powered is less than 18.5 volts, the unit will charge itself and provide power via the usb or dc.....I'm doing it right now with this laptop I'm using....the powerbrick died on this laptop.....this laptop uses 12 volts so, the Poweradd can reasonably provide output to the laptop and charge itself at the same time.......I have another laptop that is 19 volts and the unit continually depleted while plugged in to the wall to charge.....but it still provided power to the laptop....
105124
No, you do not need a separate power source. The cooling pad can be powered through a USB port on your computer. I choose to use a separate source to keep the USB port open for other devices.
95048
Yes, you have to connect this hub with a power adapter. The power from the usb port of your laptop will not be enough to power the hub.
160107
It requires a power adaptor to be plugged, but one comes with the item, however you will need an AC outlet nearby as the power cord is only 30 ins long or you can attach it to an extension cord.
1146880
It isn't an external battery. You put the battery in the laptop and connect the laptop power cable.
404143
No need for power. I haven't tried it on any other laptops, just my Leveno.
561087
yes it has an independent power supply and uses your laptop operating system
842093
It comes with the AC adapter. I use this one on my work bench, so I use it plugged in. I have a different one at my desk that is battery powered. Both of them work well.
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.
1331295
It is powered off the USB bus. I use an adapter plugged into 110 volts to insure constant adequate power (because some USBs have more power than others).
647544
None... However, you must USE a separate power supply for the adapter. You must use at least 5 volts @ 2 Amps or 2000 mili-Amps or higher. It is use to power up what ever device that you going to use. Having a USB to power cord which came with the adapter is NOT good enough. My adapter plugs in deep into my laptop. I have problems with some USB devices because of the thickness of the USB end. It gets in the way of the laptop case. I use an extender to help resolve that problem.
1312680
Only "adapter" it comes with is an AC adapter and power cord (charges up your laptop battery).