One interesting tidbit from the video that is officially posted by Redmi is the fact that the phone was able to touch 290W (not the claimed 300W) only once and that too for about 3 seconds of time.
Redmi 300W fast charging solution
The Redmi 300W fast charging solution is by far the fastest solution on the market. It is the theoretical max speed the charger and the battery can reach. It’s possible the customised Redmi Note 12 Discovery edition in the video is capping out the speed for safety reasons. The adapter itself comes with Double GaN technology and has “more than 50 safety protections.” Despite this, the charger retains a small size.
Neither Xiaomi nor Redmi have mentioned when the 300W fast charging solution will be made available to customers. But we believe, the solution will be first available in China and later rollout globally. Since the tech is from Redmi, there are high chances, it might first come on a Note series model. We should learn more details about the new charging solution soon.