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).
1 A monitor with a supply from the wall can power, or charge, a laptop while still displaying. 2  USB power bricks or chargers are able to supply power through a laptops USB ports.  Laptops and USB power bricks can provide higher power to battery powered devices (not currently defined by USB).