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EmPower is a brand name that refers to three different power outlets available on commercial airlines: 15-Volt, 75 Watt DC connector (now called EmPower Classic by the vendor) 5-Volt, 10 Watt USB power-only jacks [1] 110-Volt, AC power jacks (some also have an EmPower USB jack)
In 2012, the USB Power Delivery (PD) specification was released. The USB PD specification provides the ability for 5 V devices to draw more than (the USB battery-charging specification limit of) 7.5 W of power from USB "PD-aware" ports when using PD-aware USB cables.
Quick Charge is a proprietary technology that can charge battery-powered devices, primarily mobile phones, at power levels exceeding the 7.5 watts (5 volts at 1.5 amps) supported by the USB BC 1.2 standard, using existing USB cables. The higher voltage available allows more power (watts) to be supplied through wires without excessive heating.
IEEE P1823 was a proposed global standard for a universal power adapter for mobile devices (UPAMD) that require between 10 W and 240 W. E.g., Laptops, larger tablets and other mobile devices that can require much more power than the (non-Power Delivery) USB battery charging specification limit of 7.5 W at 5 V. [25]
Instead of six fixed profiles, power supplies may support any maximum source output power from 0.5 W to 100 W. The USB Power Delivery specification revision 3.0 defines an optional Programmable Power Supply (PPS) protocol that allows granular control over V BUS output, allowing a voltage range of 3.3 to 21 V in 20 mV steps, and a current ...
USB-C devices may optionally provide or consume bus power currents of 1.5 A and 3.0 A (at 5 V) in addition to baseline bus power provision; power sources can either advertise increased USB current through the configuration channel or implement the full USB Power Delivery specification using both the BMC-coded configuration line and the legacy ...