The specific analysis of how Apple's two wireless charging phones charge each other is as follows:
1. Connect the USB-C port on your MagSafe charger to an Apple USB-C power adapter of 20 watts or higher or a compatible third-party USB-C adapter. It can also be connected to a USB-C port on a Mac or PC. Place the MagSafe charger face up on a flat surface, making sure there are no metal or other foreign objects nearby.
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2, then put the phone on the MagSafe charger, so that the display face up to wireless charging.
Apple wireless charging can not charge each other, because the phone does not have a reverse charging module, only the module that is charged