As with previous USB versions, USB 3.0 ports come in low-power and high-power variants, providing 150 mA and 900 mA respectively, while simultaneously transmitting data at SuperSpeed rates. Additionally, there is a Battery Charging Specification (Version 1.2 – December 2010), which increases the power handling capability to 1.5 A but does not allow concurrent data transmission. The Battery Charging Specification requires that the physical ports themselves be capable of handling 5 A of current[citation needed] but limits the maximum current drawn to 1.5 A. COUNT 4
QSN1 What are the power variants in USB 3.0 ports? ANS1 low-power and high-power QSN2 What do the power variants provide? ANS2 150 mA and 900 mA respectively QSN3 What does the Battery Charging Specification do? ANS3 increases the power handling capability to 1.5 A QSN4 What is a downfall of the Battery Charging Specification? ANS4 does not allow concurrent data transmission