At the October 18 presentation, Apple said that you have the opportunity to take advantage of fast charging on the 14-inch and 16-inch MacBook Pro 2021. This charge allows you to power the device in 30 minutes up to 50%, which is a good indicator considering the battery capacity of the new Mac.
The new USB-C charging standard allows for the first time ever to exceed 100W of power. But there is one caveat: there are no cables yet that would support this standard.
USB-C Power Delivery technology allows you to get a current charge of up to 100W. The new MacBook Pro 2021 uses the next-generation USB PD 3.1 Extended Power Range (EPR) standard and delivers up to 28V at 5A. This delivers up to 240W of current.
There are currently no compatible USB-C PD 3.1 EPR cables in nature. And it will take some time for manufacturers to be able to develop them and get the technology certified/accessed.
Therefore, for now, fast charging will only be available with MagSafe 3 when using a proprietary 140W power adapter.
We hope manufacturers will react quickly and add a new standard to their accessories. In the meantime, you’ll have to use MagSafe 3.
A source: 9to5mac