Charging iphone 4 with usb

About Apple USB power adapters

This overview will help you identify a USB power adapter from Apple. Apple USB power adapters and cables are included with many products and are available separately from Apple and authorized Apple resellers.

Customer safety is a top priority at Apple. That’s why all our products—including USB power adapters—undergo rigorous testing for safety and reliability and are designed to meet government safety standards around the world.

As part of our efforts to reach our environmental goals, iPhone models no longer include a power adapter in the box. iPhone continues to work with existing power adapters and USB-A to Lightning cables, such as those included in prior models. iPhone models now include in the box a newer USB‑C to Lightning cable that supports fast charging and is compatible with USB‑C power adapters and computer ports that you might already have. You can use either a USB-A to Lightning cable or the newer USB-C to Lightning cable with your iPhone.

You can use any of the adapters listed below to charge your iPhone, iPad, Apple Watch, or iPod. You can also use a Mac USB-C Power Adapter or third-party adapters that comply with applicable safety standards. For more information about charging your iPhone, iPad, Apple Watch, or iPod, refer to the Safety, Handling, and Support section of the iPhone User Guide, iPad User Guide, Apple Watch User Guide, or iPod User Guide.

5W USB power adapter

Most iPhone models earlier than iPhone 11 came with a 5W power adapter in the box.

10W USB power adapter

These devices come with a 10W power adapter in the box:

• iPad Air 2
• iPad Air
• iPad mini 4
• iPad mini 3
• iPad mini 2
• iPad 2

12W USB power adapter

These devices come with a 12W power adapter in the box:

• iPad Pro 12.9-inch (2nd generation)
• iPad Pro 12.9-inch (1st generation)
• iPad Pro (10.5-inch)
• iPad Pro (9.7-inch)*
• iPad Air (3rd generation)*
• iPad mini (5th generation)*
• iPad (7th generation)*
• iPad (6th generation)*
• iPad (5th generation)*

* In some countries and regions, this model ships with the 10W power adapter.

18W USB-C power adapter

These devices come with an 18W power adapter in the box:

• iPad Pro 12.9 inch (4th generation)
• iPad Pro 12.9 inch (3rd generation)
• iPad Pro 11-inch (2nd generation)
• iPad Pro 11-inch

The Apple 18W USB-C power adapter can fast charge your iPhone 8 or later.

20W USB-C power adapter

These devices come with a 20W power adapter in the box:

• iPad mini (6th generation)
• iPad (9th generation)
• iPad Pro 12.9-inch (5th generation)
• iPad Pro 11-inch (3rd generation)
• iPad (8th generation)
• iPad Air (4th generation)

Learn about USB power adapter certifications

When an iOS or iPadOS device comes with an Apple USB power adapter, that adapter is certified to meet government safety standards in countries and regions where the device is available. Many of these countries and regions, including the United States, have adopted the Safety of Information Technology Equipment standard, IEC/UL 60950-1.

Apple USB power adapters are designed for use with power sources rated to provide 100V AC to 240V AC at 50Hz to 60Hz. The Type A (flat parallel-blade design) Apple 5W USB, 18W, and 20W USB-C power adapters, as well as the 10W and 12W USB power adapters (with Type A AC plug attached) also comply with the IEC/UL 60950-1 and IEC/UL 62368-1 standards for use with power sources rated to provide 115V AC at 400Hz.

Learn more about USB power adapters

These power adapters are also available separately from Apple and authorized Apple resellers.

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About Apple USB power adapters

This overview will help you identify a USB power adapter from Apple. Apple USB power adapters and cables are included with many products and are available separately from Apple and authorized Apple resellers.

Customer safety is a top priority at Apple. That’s why all our products—including USB power adapters—undergo rigorous testing for safety and reliability and are designed to meet government safety standards around the world.

As part of our efforts to reach our environmental goals, iPhone models no longer include a power adapter in the box. iPhone continues to work with existing power adapters and USB-A to Lightning cables, such as those included in prior models. iPhone models now include in the box a newer USB‑C to Lightning cable that supports fast charging and is compatible with USB‑C power adapters and computer ports that you might already have. You can use either a USB-A to Lightning cable or the newer USB-C to Lightning cable with your iPhone.

You can use any of the adapters listed below to charge your iPhone, iPad, Apple Watch, or iPod. You can also use a Mac USB-C Power Adapter or third-party adapters that comply with applicable safety standards. For more information about charging your iPhone, iPad, Apple Watch, or iPod, refer to the Safety, Handling, and Support section of the iPhone User Guide, iPad User Guide, Apple Watch User Guide, or iPod User Guide.

5W USB power adapter

Most iPhone models earlier than iPhone 11 came with a 5W power adapter in the box.

10W USB power adapter

These devices come with a 10W power adapter in the box:

• iPad Air 2
• iPad Air
• iPad mini 4
• iPad mini 3
• iPad mini 2
• iPad 2

12W USB power adapter

These devices come with a 12W power adapter in the box:

• iPad Pro 12.9-inch (2nd generation)
• iPad Pro 12.9-inch (1st generation)
• iPad Pro (10.5-inch)
• iPad Pro (9.7-inch)*
• iPad Air (3rd generation)*
• iPad mini (5th generation)*
• iPad (7th generation)*
• iPad (6th generation)*
• iPad (5th generation)*

* In some countries and regions, this model ships with the 10W power adapter.

18W USB-C power adapter

These devices come with an 18W power adapter in the box:

• iPad Pro 12.9 inch (4th generation)
• iPad Pro 12.9 inch (3rd generation)
• iPad Pro 11-inch (2nd generation)
• iPad Pro 11-inch

The Apple 18W USB-C power adapter can fast charge your iPhone 8 or later.

20W USB-C power adapter

These devices come with a 20W power adapter in the box:

• iPad mini (6th generation)
• iPad (9th generation)
• iPad Pro 12.9-inch (5th generation)
• iPad Pro 11-inch (3rd generation)
• iPad (8th generation)
• iPad Air (4th generation)

Learn about USB power adapter certifications

When an iOS or iPadOS device comes with an Apple USB power adapter, that adapter is certified to meet government safety standards in countries and regions where the device is available. Many of these countries and regions, including the United States, have adopted the Safety of Information Technology Equipment standard, IEC/UL 60950-1.

Apple USB power adapters are designed for use with power sources rated to provide 100V AC to 240V AC at 50Hz to 60Hz. The Type A (flat parallel-blade design) Apple 5W USB, 18W, and 20W USB-C power adapters, as well as the 10W and 12W USB power adapters (with Type A AC plug attached) also comply with the IEC/UL 60950-1 and IEC/UL 62368-1 standards for use with power sources rated to provide 115V AC at 400Hz.

Learn more about USB power adapters

These power adapters are also available separately from Apple and authorized Apple resellers.

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Fast charge your iPhone

Use fast charge with certain iPhone models. You can recharge your iPhone up to 50 percent battery in around 30 minutes.

You can fast charge your iPhone 8 and later up to 50 percent battery in around 30 minutes. 1

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

• Apple 18W, 20W, 2 29W, 30W, 61W, 87W, or 96W USB-C Power Adapter
• A comparable third-party USB-C power adapter that supports USB Power Delivery (USB-PD)

If you’re not sure which Apple Power Adapter you have, check the wattage on the top or bottom of the adapter:

1. Testing conducted by Apple in August 2017 using preproduction iPhone X, iPhone 8, and iPhone 8 Plus units and software, and in August 2018 using preproduction iPhone XS, iPhone XS Max, and iPhone XR units and software, with accessory Apple USB-C Power Adapters (18W Model A1720, 29W Model A1540, 30W Model A1882, 61W Model A1718, 87W Model A1719). Testing conducted by Apple in August 2019 using preproduction iPhone 11, iPhone 11 Pro, and iPhone 11 Pro Max units and software and accessory Apple USB-C Power Adapters (18W Model A1720, 29W Model A1540, 30W Model A1882, 61W Model A1947, and 87W Model A1719). Testing conducted by Apple in February 2020 using preproduction iPhone SE (2nd generation) units and software and accessory Apple USB-C Power Adapters (18W Model A1720 and 30W Model A1882). Testing conducted by Apple in September 2020 using preproduction iPhone 12, iPhone 12 mini, iPhone 12 Pro, and iPhone 12 Pro Max units and software and accessory Apple USB-C Power Adapter (20W Model A2305). Fast-charge testing conducted with drained iPhone units. Charge time varies with environmental factors; actual results will vary.

2. You need a 20W or higher power adapter to fast charge your iPhone 12.

Information about products not manufactured by Apple, or independent websites not controlled or tested by Apple, is provided without recommendation or endorsement. Apple assumes no responsibility with regard to the selection, performance, or use of third-party websites or products. Apple makes no representations regarding third-party website accuracy or reliability. Contact the vendor for additional information.

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Fast charge your iPhone

Use fast charge with certain iPhone models. You can recharge your iPhone up to 50 percent battery in around 30 minutes.

You can fast charge your iPhone 8 and later up to 50 percent battery in around 30 minutes. 1

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

• Apple 18W, 20W, 2 29W, 30W, 61W, 87W, or 96W USB-C Power Adapter
• A comparable third-party USB-C power adapter that supports USB Power Delivery (USB-PD)

If you’re not sure which Apple Power Adapter you have, check the wattage on the top or bottom of the adapter:

1. Testing conducted by Apple in August 2017 using preproduction iPhone X, iPhone 8, and iPhone 8 Plus units and software, and in August 2018 using preproduction iPhone XS, iPhone XS Max, and iPhone XR units and software, with accessory Apple USB-C Power Adapters (18W Model A1720, 29W Model A1540, 30W Model A1882, 61W Model A1718, 87W Model A1719). Testing conducted by Apple in August 2019 using preproduction iPhone 11, iPhone 11 Pro, and iPhone 11 Pro Max units and software and accessory Apple USB-C Power Adapters (18W Model A1720, 29W Model A1540, 30W Model A1882, 61W Model A1947, and 87W Model A1719). Testing conducted by Apple in February 2020 using preproduction iPhone SE (2nd generation) units and software and accessory Apple USB-C Power Adapters (18W Model A1720 and 30W Model A1882). Testing conducted by Apple in September 2020 using preproduction iPhone 12, iPhone 12 mini, iPhone 12 Pro, and iPhone 12 Pro Max units and software and accessory Apple USB-C Power Adapter (20W Model A2305). Fast-charge testing conducted with drained iPhone units. Charge time varies with environmental factors; actual results will vary.

2. You need a 20W or higher power adapter to fast charge your iPhone 12.

Information about products not manufactured by Apple, or independent websites not controlled or tested by Apple, is provided without recommendation or endorsement. Apple assumes no responsibility with regard to the selection, performance, or use of third-party websites or products. Apple makes no representations regarding third-party website accuracy or reliability. Contact the vendor for additional information.

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