Apple fast charge protocol

Before the transition to USB PD, Apple's USB-A power adapters used proprietary charging-port identification schemes, including Apple 2.4A. This proprietary mode allows compatible devices to draw up to 12W and is not a standard USB power profile.

Starting with the 18W A1695 USB-C power adapter, Apple uses the USB Power Delivery (USB PD) standard. These adapters can charge compatible third-party devices, while Apple devices can also be charged from compatible third-party USB PD adapters.

Apple does not divide its USB-C power adapters into models intended only for smartphones or only for laptops. Any USB PD-compatible Apple device can be charged from any USB PD power adapter, while the actual charging power is determined by the capabilities of the device, adapter, and cable.

A detailed list of Apple devices - smartphones, tablets, and laptops - with supported voltages and power levels when charging via USB PD is available on the USB PD (Power Delivery).

Apple power adapters and their output profiles:

5W (5V1A)
10W (5.1V2.1A)
Apple 2.4A proprietary charging protocol - 12W (5.2V2.4A)
18W (5V3A, 9V2A)
20W (5V3A, 9V2.2A)
29W (5.2V2.4A, 14.5V2A)
30W (5V3A, 9V3A, 15V2A, 20V1.5A)
35W (5V3A, 9V3A, 15V2.33A, 20V1.75A)
40W Dynamic Power Adapter with 60W Max (5V3A, 9V3A, 9-15V2.67A (3A DPS), 15-20V2A (3A DPS))
61W (5V2.4A, 9V3A, 15V3A, 20.3V3A)
67W (5.2V3A, 9V3A, 15V3A, 20.3V3.3A)
70W (5V3A, 9V3A, 15V3A, 20.6V3.4A)
87W PD 2.0 (5.2V2.4A, 9V3A, 20.2V4.3A)
96W (5.2V3A, 9V3A, 15V3A, 20.5V4.7A)
140W PD 3.1 EPR (5.2V3A, 9V3A, 15V5A, 20.5V5A, 28V5A)