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1. This really depends on how much sound leaks out. The original earpods were designed to leak a little bit of sound but were still used in airplanes.

2. I take a lot of 4 hour flights. I see people use steam decks on them all the time, even though their batteries don't hold for the whole flight.

3. I don't know the answer, but I wonder what the largest battery you could bring onto a flight is, and how long that would extend the Vision Pro's battery life.