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A comment on New MacBook Pro models to feature magsafe, no touch bar and more ports: analyst. Parent comment

Re:New MacBook Pro models to feature magsafe, no touch bar a... by Klathmon on Friday January 15, 2021 @11:42AM (#25792785)
I'm not sure that's true.

I believe modern wireless chargers are around 75% to 85% efficient.

That sounds bad at first, but I believe most ac-dc charging bricks are in the 80% to 90% efficiency range, so it's actually not much worse at all.

And if it really is magsafe, the "secret sauce" there is the magnets will align things almost perfectly every time avoiding unaligned charging coils.

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Re:New MacBook Pro models to feature magsafe, no touch bar a... by AlexandrB on Friday January 15, 2021 @11:48AM (#25792856)
There's still a charging brick powering the wireless charger so isn't the 75-85% stacked on top of the 80-90%? That gives you 56-77% efficiency.
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Re:New MacBook Pro models to feature magsafe, no touch bar a... by Klathmon on Friday January 15, 2021 @11:49AM (#25792885)
ah good point, I'm not sure what I was thinking!
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Re:New MacBook Pro models to feature magsafe, no touch bar a... by claar on Friday January 15, 2021 @12:01PM (#25793052)
But will users know or care?
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Re:New MacBook Pro models to feature magsafe, no touch bar a... by theblindbat on Friday January 15, 2021 @11:46AM (#25792838)
But aren't you going AC->DC->wireless? So it would stack
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