Re:MacBook Pro 14-inch and MacBook Pro 16-inch
by junon on Monday October 18, 2021 @09:49PM
(#28913998)
If I put 120 volts through to my MacBook directly over the cable it will invariably damage it. Voltage negotiation doesn't matter here.
Also the original comment was unclear; they've edited to clarify. But of course, I'm the bad guy on HN for not being able to read minds.
E: I realize my GP comment was also unclear. I should have said "excessive" voltage, not improper I suppose. "Improper" in my head meant outside the rated voltage for either end/the cable. I'm not the one being a pedant here.
Re:MacBook Pro 14-inch and MacBook Pro 16-inch
by anamexis on Monday October 18, 2021 @10:13PM
(#28914130)
Voltage negotiation matters, because that what keeps a charger from putting 120 volts into your MacBook.
Which is exactly what GP was saying in the very part that you quoted:
> chargers and cables are advertised with the wattage they support, but it's really the voltage and current that matters.
and what you agreed with in that very same comment:
> Also, it arguably does have everything to do with volts
Oh? Everyone else seems to think the mechanisms are sufficient for safety.
> This wasn't my point, despite me addressing negotiation in another comment.
I still don't understand your point, unless it's a failed effort at pedantry.