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Implementers should note that if they include battery charging capability in their devices or support for host adapters such as docks or ACAs they should also reference the Battery Charging Specification. Power Delivery is designed to co-exist with standard USB Battery Charging implementations. Battery powered devices can get increased charging current from a hub and then give it back temporarily when the userвЂ™s HDD requires to spin up.

Laptops and USB power bricks can provide higher power to battery powered devices (not currently defined by USB).

USB power bricks or chargers are able to supply power through a laptopвЂ™s USB ports.

A monitor with a supply from the wall can power, or charge, a laptop while still displaying.

This eliminates the need for a separate power brick.

Enables new higher power use cases such as USB bus powered Hard Disk Drives (HDDs) and printers.

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Enables higher power over a full featured USB Type-C В® cable and connector to applications up to 240W, including larger Notebook PCs, Gaming PCs, Desktops, Workstations, Docking Stations and Displays.

Allows low power cases such as headsets to negotiate for only the power they require.

Intelligent and flexible system level management of power via optional hub communication with the PC.Optimize power management across multiple peripherals by allowing each device to take only the power it requires, and to get more power when required for a given application.This enables the product with the power (Host or Peripheral) to provide the power. An adjustable voltage supply mode allows the device being powered an ability to request intermediate voltages between 15V and up to the maximum available fixed voltage of the charger.New 28V, 36V, and 48V fixed voltages enable up to 140W, 180W and 240W power levels, respectively.Increased power levels from existing USB standards up to 240W.USB Power Delivery offers the following features: The USB Type-C specification has also been updated to Release 2.1 to define 240W cable requirements, and with the updated USB PD protocol and power supply definition, this extends the applicability of USB power delivery to a large number of applications where 100W wasn't adequate.

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Its aim is to operate with and build on the existing USB ecosystem.ДЄnnounced in 2021, the USB PD Revision 3.1 specification is a major update to enable delivering up to 240W of power over full featured USB Type-C В®В cable and connector.В Prior to this update, USB PD was limited to 100W using a solution based on 20V using USB Type-C cables rated at 5A. The USB Power Delivery (USB PD) Specification enables the maximum functionality of USB by providing more flexible power delivery along with data over a single cable. Users need USB to fulfil their requirements not only in terms of data but also to provide power to, or charge, their devices simply, often without the need to load a driver, in order to carry out вЂњtraditionalвЂќ USB functions.

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USB has become a ubiquitous power socket for many small devices such as cell phones, tablets, portable speakersВ and other hand-held devices. Today many devices charge or get their power from USB ports contained in laptops, workstations, docking stations, displays, cars, airplanesВ or even wall sockets. USB has evolved from a data interface capable of supplying limited power to a primary provider of power with a data interface.

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