What is the power output of a USB port? - Super User
What is USB Power Delivery and how does USB PD work?
USB-C - Wikipedia
GRL introduces its 240W Power Delivery Tester to support the latest USB PD Specification | GraniteRiverLabs
USB made easier - Electronic Products
What Types of USB Power Delivery Should I Use in My Project?
GIGABYTE 3x-usb-power
Raspberry Pi Power Supply Micro USB B Specification
A short primer on USB Type-C PD 3.0 specification and design - EDN
Amazon.com: UXWEN Universal USB to 5V DC Power Cable, 8-in-1 DC 5.5x2.1mm Jack Charging Cable Power Cord with 8 Interchangeable Plugs (5.5x2.5, 4.8*1.7, 4.0x1.7, 3.5x1.35, 2.5x0.7, Micro USB, Type-C, LED Convert) :
About Apple USB power adapters - Apple Support
USB - Wikipedia
Testing considerations for USB and USB-PD - Power Electronic Tips
What is the power output of a USB port? - Super User
USB 3.0 vs USB 2.0: A quick reference summary for the busy engineer - Embedded.com
USB Type-C Power-Only Overview | DigiKey
USB Power Capabilities
USB-IF Announces Publication of New USB4® Specification to Enable USB 80Gbps Performance | Business Wire
What is USB Power Delivery? – Zendure
KGI: All 2017 iPhones to retain Lightning ports while supporting faster charging
