Is 18W good for iPhone 12?
Eleanor Gray
Published May 20, 2026
Yes, your old 18W adapter charges the iPhone 12 as fast as the new 20W charger - PhoneArena.
What wattage is best for iPhone 12?
Apple 20W USB-C power adapterNote: For fast charging, iPhone 12 and later models require a power adapter with a minimum power output of 20 watts, such as the Apple 20W USB power adapter. If you use a third-party power adapter, it should meet these recommended specifications: Frequency: 50 to 60 Hz, single phase.