3C listing reveals that the charger carries a model number MDY-12-EQ and supports multiple charging rates, which are 5V/2A (10W), 9V/3A (27W), 20V/2.5A (50W), and 11V/5A (55W). So, the device supports up to 55W fast charging. This is in line with a recent leak, which revealed that Xiaomi Mi 11 will support up to 55W charging.
Yesterday, Xiaomi Mi 11 and Mi 11 Pro battery got certified on 3C, which revealed that the phones will carry a battery with 4,780mAh and 4,970mAh rated capacity. The company already announced that Mi 11 will be the first smartphone to launch with Qualcomm’s latest Snapdragon 888 chipset.

Xiaomi Mi 11 with 55W fast charging spotted on 3C certification - 89