USB-C host devices provide a maximum of 5V3A/15W over their USB-C ports, but many even less than that, especially when running off battery power (AFAIK TB3 and TB4 mandate 15W output). It's entirely possible for a (relatively) large, bright, high refresh rate display to drain its battery while connected to a port like that. And yes, most of these devices rely on two cables for data and power.Hi all!
I'm trying out an ASUS rog xg17ahp. If I use it with a laptop connected by the usb-c/powerdisplay port, so with only a single cable, the battery of the monitor is slowly going down. Is it normal? Or maybe it doesnt get enough power from the laptop, or i should change something in the monitor settings?
And a general question. How does power part usually works with this portable monitors? they usually need some external power source?
Also are some of the touchscreen version of these screen can be used as a tablet? Or without a built in wifi this is not possible?
You would need some sort of wireless display tech to use it untethered as a tablet, yes. WiFi wouldn't work well - it would cause significant compression artifacting and high latency. Something like WiGig is required for visually lossless, fast response time wireless display usage, and WiGig is pretty rare and finicky (needs line-of-sight and relatively large antennas).