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davinaMi62 Author

Level 1

8 points

Amperage required for charging

How many amps does my MacBook Air (M1, 2020) need when charging?

MacBook Air 13″, macOS 12.2

Posted on Mar 5, 2022 11:10 AM

Best reply

John Galt

Level 10

140,790 points

Posted on Mar 5, 2022 12:57 PM

Your model MacBook Air uses a 30W power adapter: About Mac power adapters - Apple Support.

It does not require all 30W just to charge. The battery's charging rate will diminish as less power is provided to it, and as the battery reaches its maximum state of charge that rate becomes limited by both hardware and software design considerations.

To answer your question, the required current is a function of the power adapter's voltage, which is permitted to vary according to the USB-C industry standard. Refer to USB Charger (USB Power Delivery) for an explanation.

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Amperage required for charging

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