iPhone 12 Pro Max supports MagSafe magnetic wireless charging, and with Apple 20W charger, the output power of the measured charger can reach 18W stage, which can provide 15W wireless charging for iPhone 12 Pro Max.
When the iPhone 12 Pro Max is placed on the MagSafe magnetic wireless charger, the power at the output end of the charger begins to rise gradually, and then the current begins to jitter regularly. After 1 hour and 16 minutes, the fluctuation amplitude increased and even broke the charge phenomenon, after 2 hours and 20 minutes, the power and current gradually decreased until the end of the charge, the whole process took about 3 hours and 29 minutes, the highest output power of the charger is 8.93V 2.04A 18.25W.