Beside 5Gbps, USB 3.0 specifications promised the capability to deliver 100 Watt (20V, 5A) of power to charge laptops, monitors, and other relatively power hungry devices directly via USB. The USB IF is currently showcasing a prototype based on DisplayLink docking station capable of both charging a laptop and connecting to a display via the same USB “power delivery” cable, and is expecting retail products to become available by the end of the year.
100 Watt are only achievable for a full USB port, although micro USB power delivery is also possible but at lower power.
The dock combines ROHM BD-92101 USB power delivery chipset with USB Graphics and docking chipset solutions from DisplayLink according to that press release.
The main advantage of this system is that you don’t need to carry your power adapter without, you’ll just need to bring your laptop, and plug it into a compatible USB 3.0 dock or monitor.