USB-C vs. barrel charger. Almost all of the GaN aftermarket chargers out today use the familiar USB-C port and USB-Power Delivery (PD) charge rates. Currently, USB-PD tops out at 100 watts, but aUSB-C is good for passive charging like while the laptop is not being used, juice it up. If you use it at the same time, it will use the battery and shorten its lifespan. Also bare in mind you won't be able to do much gaming in usb-c. If you don't care about slower charging, and lower battery lifespan, than go for it! HP suggests that if you charge your laptop battery to less than 90% instead of 100%, Similarly, ASUS laptops have a Maximum Lifespan Mode that limits charging to 60%. Other companies like Dell
Asus laptops use the same charger, but there are certain differences. The Asus P5Z77-V Laptop Charger has a Qualcomm Quick Charging technology that helps to charge your device faster. Additionally, the Asus charger has a built-in LED light to indicate when the device is ready to be used.
The short answer is yes it could exist, but likely does not. A USB-C Power Delivery Source communicates with the βSinkβ over the configuration data line which is provided in a USB-C connector. This data line is what allows devices to request different voltages such as 5, 12, or 20 volts. The standard power port on an ASUS appears to be
dPqp.