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Jul 10, 2018 at 13:05 comment added nekomatic USB Power Delivery means that the device and the charger can negotiate the voltage and current that will be supplied and drawn. Whether two MacBooks can both charge when daisy chained depends on exactly how the MacBook implements the Power Delivery spec but the reasoning behind your calculation is not correct - for example the upstream MacBook's port could tell the downstream one 'you can draw up to 29 watts' and the downstream one should obey the instruction.
Jan 11, 2017 at 17:03 history edited Allan CC BY-SA 3.0
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Jan 11, 2017 at 16:41 history answered Allan CC BY-SA 3.0