Following the launch of orders yesterday for the two new 35-watt dual USB-C power adapters introduced at WWDC, Apple has released a new support document detailing how power is distributed when devices are connected to both ports.


In most scenarios, the 35-watt total watts will be shared equally between the two connected devices, except when one of the devices requires relatively little power, such as an Apple Watch or AirPods case.

  • If you connect a Mac notebook and an iPhone or iPad, each device will receive a maximum of 17.5W.
  • If you connect an ‌iPhone‌ and an ‌iPad‌, each device will receive a maximum of 17.5W.
  • If you connect a Mac notebook or ‌iPhone‌ and an Apple Watch or AirPods, the Mac notebook or iPhone‌ will receive up to 27.5W and the Apple Watch or AirPods up to 7.5W.

The standard version of the dual USB-C adapter is available worldwide and has a removable plug head for compatibility with international plug heads and extension cables. The compact version is only available in the US, Canada, China, Japan, Mexico and some other countries that use the type A plug style. Both versions cost $59 in the United States, and the new adapters ship next month with higher configurations of the new MacBook Air.

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