OPPO's 65 W SuperVOOC 2.0 is the current most powerful fast-charging technology in the world, as it charges a 4000 mAh battery from 0-100% in half an hour. Xiaomi has other ideas, however, and is set to debut its own 100 W charging technology that will charge almost twice as fast as OPPO's solution.
https://www.notebookcheck.net/Xiaomi-s-new-100-W-fast-charging-technology-fully-charges-a-4000-mAh-battery-in-just-17-minutes.443747.0.html