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(1) (powered USB) A USB port on a computer that can charge a portable device even when the computer is turned off, as long as it is plugged into the wall.

The Yellow USB
The yellow USB port is live for charging even when the computer is turned off.

(2) (PoweredUSB) A high-power USB interface from IBM that provides six amps at 5, 12 and 24-volts. Used for peripherals that need more than the standard USB maximum 500 milliamps, power is transferred in separate wires within the cable. See USB.

Sockets on the Host Side
The power socket is stacked above the standard USB socket, and PoweredUSB plugs insert into both cavities. Notice how sockets are keyed differently depending on voltage. The other side of the cable is typically permanently attached to the peripheral device.
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Options include a secondary hard disk drive display, a backup battery, and a powered USB port with integrated power supply.
1 compliant port or powered USB hub are the minimum requirements for both Macs and PCs.
Latest model introduces faster processor to Sharp POS product line and powered USB
Solar powered USB cell phone charger also provides the outdoor essentials of light, information and energy
The new USB Audio Station also features a seamlessly integrated stereo audio amplification system, plus a 3-port powered USB hub--making it an ideal base station for all Apple MacBook laptops, as well as Dell[R], HP[R], Sony[R] and other Microsoft[R] Windows[R]-based PC laptops.
Featuring a built-in iSight video camera, microphone and speakers, powered USB 2.
June 24 /PRNewswire-FirstCall/ -- Delivering on the specialized requirements of the Mac community, Seagate today introduced an advanced line-up of mobile and desktop FreeAgent for Mac storage solutions and accessories: the FreeAgent(TM) Go for Mac with USB, FreeAgent(TM) Go Pro for Mac, the 2TB FreeAgent(TM) Desk for Mac and FreeAgent(TM) Go Dock+, a powered USB hub and dock for the FreeAgent Go.
In addition to the USB graphics adapter, the BVUMD3 provides three DisplayLink USB virtual graphics powered USB 2.
May 9 /PRNewswire-FirstCall/ -- JDSU (Nasdaq: JDSU; TSX: JDU), the leading enabler of broadband and optical innovation, announced today its Photonic Power Business Unit will be demonstrating an optically powered USB data link at the International Society for Magnetic Resonance in Medicine (ISMRM) conference in Seattle, Washington.
2 or greater, Linux Aegis Padlock is compatible with virtually any system with a powered USB port and ships preformatted in NTFS for Windows support.
FxFoto Portable Pictures, the first photo software designed specifically for traveling and on-the-go digital photo users, is a complete suite designed to run directly from U3 powered USB smart drives, occupying only a few megabytes and leaving more than enough room for digital image storage.
a leading productivity software provider, announced today it has shifted the power of computer password and digital identity storage/management to a truly portable, increasingly popular, platform -- U3 powered USB smart drives.