Why is my iPhone 11 not charging fast
my new iPhone 11 is charging slowly
is it necessary to buy the iPhone 11 charging head?
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Hello,
See this:
Fast charge your iPhone - Apple Support
So yes, you will need a charging adapter similar to this one:
20W USB-C Power Adapter - iPhone Accessories
Note: requires a USB-C cable which you probably already have:
USB-C to Lightning Cable (1 m) - iPhone Accessories
Good luck.