I thought USB uses 5 volts http://en.wikipedia.org/wiki/USB
1948901
Yes USB uses 5V 1A. To Charge tablets, iPad, etc., sometimes make sure that the output is 5V 2.1 amp, higher the amperage, better charging time.
1600402
As I understand, the higher side output is 2.1 amps at 5 volts. I believe most USB ports on computers put out 0.5 - 0.9 amps. 2.1 amps will charge devices faster. I'd recommend contacting Mediabridge directly - http://www.mediabridgeproducts.com/store/pc/home.asp (856) 216-8222. They were most helpful when I was deciding to buy.
1880655
You can hook up +5v to +12v to the VCC pin if you have an external DC power source, otherwise you need to use the USB.
902296
Both USB ports are 5V, one at 1.0 A for iPods and phone, e.g., and one at 2.5 A, for tablets, e.g. The DC port output is variable, at 9, 12, 16, 19, and 21 Volts. Select whichever your notebook requires. If it falls between two #'s, choose the higher. The manual has good documentation.
874207
From a technical stand point not really.. the USB port on a PC maximum can only provide 5volts power and that is known to cause damage to USB port if maintained for any amount of time. That is why you should get a hard drive case that comes with a dual USB end to draw power from 2 ports and not a single one. The other option is a case that has external power. I used a dual port USB cable to power a small drive on my nephew's WII system.
1330378
it doesn't say powered by usb. as far as i know the only interface that powers 3.5" drives is 6 pin firewire.usb doesn't have the juice for anything more than a laptop drive. even then its shaky for some older usb adaptors which actually tend to have their own ac adaptors, like with pcmcia usb cards.
1614311
Do you mean the voltage output? If so, it outputs USB voltage (5 V DC at a max of 2 amps).
310797
Do you mean the output voltage? If so, it outputs USB voltage (5 V DC at a max of 2 amps). If you're asking about the capacity, its 5,000 mah.
1478800
If you can find a USB AAA charger you like. I believe USB is 4.5V. 1.5V to 1.25V is AAA. My guess is two AAA batteries, at a time would be best since this is a low power charger.
563271
To be 100% sure contact dell i would say it charges more than usb which is 5 volts this is 12 volts the ac adapter for home charges the most i have one of these never needed to use it but the car charges slow especially with device in use if just plugged in not in use will charge slowly with car driving hope this helps
548414
Nope. It needs 5V 2000mA. TV USB ports are just mean for powering USB sticks. So it will not support the power rating required. Same is true for self powered USB drive of large size (1TB). They do not work on USB port. But you can connect them to a powered USB hub and connect that to TV. That should probably work.
979755
Uses an AC adapter to USB cable. AC adapter is for United States but is labeled 100v - 240v. You would need a 240v adapter or 240 volt to USB plug.
1112803
pc usb ports typically put out 0.5amps. these power packs can do 1A and 2A, it probably can.
2220384
The power adapter it comes with plugs into the wall and takes 100-240VAC. It provides 5VDC at 2.6A. This means you could power up to 5 devices at the maximum rated USB power (500mA each). It should be more than enough for standard peripherals (keyboard, mouse, printer, webcam, etc.)
335686
The unit only outputs 5 volts. If you add more devices to each USB port, it will split that 5 volts.
40309
The voltage on USB charger ports are 5V. That's the standard voltage for all USB ports. Thanks!
293191
no, it is 5 (FIVE) VOLTS only, not 15 (FIFTEEN).So if you need 15 VOLTS (which I doubt it because all USB 1.0,2.0 and 3.0 can ONLY be 5 VOLTS)If you MISTYPED and it is ONLY 5 VOLTS @ 1.2 AMPS then it WILL work, because the AMPERAGE is how much PUSH the voltage has, so it would charge a 5 VOLTS and do it quicker than 1.2 AMPS, but it does NOT give 3.1 AMPS per USB port, it would max out at 2 AMPS.