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I need to know if I can charge my MacBook Air M1 using an other more powerful charger.

My phone charger is a Realme Super Dart 10 volt 6.5 ampere (65 watt) charger. I think it is adaptable to the device. I also charge another phone which needs 30 watt and it works fine. The official charger that Apple provides is 20v 1.5a or 15v 2a or 9v 3A or 5v 3A i.e. 30 watt.

I read somewhere online that if other charger is used, its voltage should be near about same to the one that Apple provides. My mobile charger is 10 volt which is quite near 9v. I know that my Mac won't charge any faster, it's just a matter of convenience of not having to carry an extra charger with me everywhere I go.

Please help me understand USB power delivery charging requirements on my Mac.

(Update : when I charge my device using my 65 watt charger, the pd that MBA shows in system report is just 5 watt. I can't understand why

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  • You are talking about charging over USB-C, right?
    – nohillside
    Feb 11 at 7:39
  • I'd suggest that the right voltage is important: the wattage power rating is just a maximum capability of the charger.
    – benwiggy
    Feb 11 at 13:04
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    USB-PD requires negotiation of both amperage and voltage (as opposed to regular USB, which only negotiates amperage and has a fixed voltage), so any compliant device should work with any compliant charger, though not necessarily at the optimal wattage for either the charger or the device. Of course, blindly assuming devices and chargers are compliant is not always a safe bet, but Apple is pretty good about this and third-party stuff has been getting better in recent years about not being blatantly non-compliant with USB standards. Feb 11 at 21:38
  • @nohillside yes it's a USB B to C Feb 12 at 9:17

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There's no harm in using that charger with your MacBook Air M1.

The Realme Super Dart 65W charger does not "just" output 10V - it negotiates the voltage with the device you're charging. This means that the maximum effect that can be drawn by the device might be less than 65W.

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