18 w
The iPhone 11 phone itself supports 18W PD fast charge, but only the Pro version is standard with 18W charger, and 11 needs to be purchased separately.
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Although the 18W fast charge is relatively tens of W for Android flagship phones, the fast charge of hundreds of W is a trivial matter, but for Apple users, the charging speed is still ok. After all, 30 minutes can be filled with 50% of the electricity is still very gratifying, 1 hour can also reach 85%, 1 hour 45 minutes or so can be basically full.
The iphone11 can use a 20w charger, and the iphone11 supports a fast charge of about 22w