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Steam Frame needs 27-45W of power to run, and it can run off an additional battery
(media.piefed.social)
Virtual Reality - Quest, PCVR, PSVR2, Pico, Mixed Reality, ect. Open discussion of all VR platforms, games, and apps.
I highly doubt it's going to need a supply that can do at least 9V to exit shipping mode, at least I haven't yet seen a device behave like that. I more so think that's what power supplies Valve suggests to use if you want to play and charge simultaneously, that being said I believe actual power usage is going to be somewhere around those 27W at max so the battery doesn't discharge, with 45W being a buffer to charge the battery while in use, though that's still just a wild guess.