3 ms·
Does it matter which one is connected to the charger? If not, that would mean they adjust that "power level" value they send over the other port which is used t
by fps_doug 4y ago
Does it matter which one is connected to the charger? If not, that would mean they adjust that "power level" value they send over the other port which is used to determine who charges who. While it would perfectly make sense to implement it that way, I'd also be surprised that manufacturers actually do.
- johnwalkr 4y agoI don't know, I didn't think about or try to see what happens when both are on battery power. I don't see how they could negotiate with each other based on battery level from my knowledge of how usb PD works. I do know that macbooks only accept one (the highest rated) power input, so when one is plugged in, it will also charge from the plugged in macbook to the other one. When trying to google for the answer, I noticed a lot of misinformation about this topic, and it doesn't seem well-known that thunderbolt can be used for networking data transfer instead of "target disk mode", which is not even support on Mx macs. Anyway, finally I found a convincing answer: It depends on the order of plugging in the cable and the first mac will plug in the second![1] This is great, the user gets to decide, and I am glad you asked this question! [1] https://www.youtube.com/watch?v=hV-zqi_ztw0 https://www.youtube.com/watch?v=hV-zqi_ztw0