How to charge your iPhone 12 battery. The iPhone 12, 12 Pro, Pro 12 Max and 12 mini don't ship with a power adapter and only a USB Type-C to Lightning cable. There are multiple ways.
Amazon USA Apple 20W Power Adapter (affiliate): https://amzn.to/2HwzPk5
As stated, this fast charger adapter should not be required for most people who own a wireless charger, older iPhone lightning cable/adapter, USB-C adapter, etc.