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2. USB hardware - Wikipedia

   en.wikipedia.org/wiki/USB_hardware

   Normally, when a computer is powered off the USB ports are powered down. This feature has also been implemented on some laptop docking stations allowing device charging even when no laptop is present. [89] On laptops, charging devices from the USB port when it is not being powered from AC drains the laptop battery; most laptops have a facility ...

3. USB - Wikipedia

   en.wikipedia.org/wiki/USB

   Standard USB hub ports can provide from the typical 500 mA/2.5 W of current, only 100 mA from non-hub ports. USB 3.0 and USB On-The-Go supply 1.8 A/9.0 W (for dedicated battery charging, 1.5 A/7.5 W full bandwidth or 900 mA/4.5 W high bandwidth), while FireWire can in theory supply up to 60 watts of power, although 10 to 20 watts is more typical.

4. Surface Laptop 2 - Wikipedia

   en.wikipedia.org/wiki/Surface_Laptop_2

   The right side of the device contains a magnetic surface connector port. The Surface Laptop 2 was criticized for failing to include a USB-C port and Thunderbolt 3 port. [4] This laptop has two omnisonic speakers, a stereo, some microphones to collect audio, and a headset jack that is located on the left-hand side of the computer. The battery ...

5. Laptop - Wikipedia

   en.wikipedia.org/wiki/Laptop

   A laptop computer or notebook computer, also known as a laptop or notebook, is a small, portable personal computer (PC). Laptops typically have a clamshell form factor with a flat-panel screen on the inside of the upper lid and an alphanumeric keyboard and pointing device on the inside of the lower lid.

6. USB 3.0 - Wikipedia

   en.wikipedia.org/wiki/USB_3.0

   A USB 3.0 controller in the form of a PCI Express expansion card Side connectors on a laptop computer. Left to right: USB 3.0 Standard-A (host) port (the five additional contacts for USB 3 visible on the underside of the tongue), VGA connector, DisplayPort connector, USB 2.0 Standard-A (host) port.

7. USB-C - Wikipedia

   en.wikipedia.org/wiki/USB-C

   USB-C plug USB-C (SuperSpeed USB 5Gbps) receptacle on a laptop. USB-C, or USB Type-C, is a 24-pin, reversible connector (not a protocol) that supersedes previous USB connectors and can carry audio, video, and other data, to connect to monitors, external drives, hubs/docking stations, mobile phones, and many more peripheral devices.