Can be tested with Ace.
Take the Apple 20W charging head as an example, connect the iPhone to Aisi Assistant through WiFi, check the real-time charging power, if the power is less than 50%, the iPhone will maintain full speed fast charging, using the original charger can reach 18W, at this time, Aisi Assistant shows \"fast charging (18W)\".
When the battery power increases to 50% ~ 80%, the iPhone will automatically adjust the charging power to 12-15W, and the charging power displayed will also change accordingly.
If the power number displayed during charging is not up to standard or does not change with the current power, there is a problem with the adapter.