Why is iPhone not using fast charging

Charge your iPhone quickly

Use fast charging with select iPhone models. You can half charge the iPhone's battery in about 30 minutes.

You can half charge the battery on iPhone 8 and later in about 30 minutes.1

Fast charging works when you use an Apple USB-C to Lightning cable and one of the following power adapters:

  • Apple 18 W, 20 W,229W, 30W, 61W, 87W, or 96W USB-C power adapter
  • Comparable third-party USB-C power supply that supports USB Power Delivery (USB-PD)

If you are not sure which Apple power supply you have, check the electrical power rating on the bottom or top:

1. From Apple in August 2017 to iPhone X, iPhone 8 and iPhone 8 Plus prototypes with software and in August 2018 to iPhone XS, iPhone XS Max and iPhone XR prototypes with software and USB-C power supplies from Tests performed by Apple (18W model A1720, 29W model A1540, 30W model A1882, 61W model A1718, 87W model A1719). From Apple in August 2019 to iPhone 11, iPhone 11 Pro and iPhone 11 Pro Max prototypes with software and USB-C power supplies from Apple (18 W model A1720, 29 W model A1540, 30 W Tests performed on the Model A1882, 61-W Model A1947, and 87-W Model A1719). Tests performed by Apple in February 2020 on Prototype iPhone SEs (2nd Generation) with Apple software and USB-C power adapters (18W Model A1720 and 30W Model A1882). Tests conducted by Apple in September 2020 with iPhone 12, iPhone 12 Mini, iPhone 12 Pro, and iPhone 12 Pro Max devices, as well as Apple software and USB-C power adapter (20 W model A2305). Fast charging has been tested on fully discharged iPhone devices. The charging time depends on various environmental factors. Actual results will vary.

2. You need a 20W power adapter or newer to quickly charge your iPhone 12.

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