Calciphylaxis. Calciphylaxis is a condition characterised by necrosis (cellular death) of the skin and fatty tissue. It is seen mainly in patients with end stage kidney disease. It is also sometimes called calcific uraemic arteriolopathy.
Besides a data link, USB provides 5 +/- 0.25 volts to power an otherwise unpowered device or charge a battery in a self powered device. A USB controller or hub is required to power one unit load (100 mA, a low power load). It can optionally power up to 5 unit loads (500 mA, a high power load).
If you want to control a lot of devices, hubs can âfan outâ the USB connection. The variety of devices which can be connected by USB-3 is almost indefinite. Also, a Host with a USB-A port can deliver power to a device with a USB-B port. There are also many stand-alone charging devices which can be used to devices with USB-B ports that contain batteries.