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by jon-wood 1143 days ago
You can even charge a MacBook from another MacBook if you happen to find yourself in a situation where you forgot the power adapter but not a USB-C cable.
1 comments

How do the devices negotiate who gives the charge and who gets charged? I’ve never tried it - I imagined it wont work at all!
I have no idea, but the device that was plugged into mains power was very happy to pass some of it on to my laptop.