Charging Macbook 12 with external USB battery pack?


macrumors 6502a
Jul 21, 2010
The problem is that these devices cannot output enough energy to charge the device while using it. Even without using it, this device will take forever to charge.


macrumors 6502
Jun 7, 2012
Anything providing 2A/5V will either manage to sustain the charge of your Macbook while using it at medium load, or charge it at light load.

Expect roughly 3x the charge time of the standard 29W charger when charging at 2A/5V (10W).
This only applies to when you are not using the Macbook, as charging it while using it will take a very long time.

Source: Personal experience with 2A/5V iPad charger and 2A/5V external battery pack.

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