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Cake day: September 7th, 2025

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  • They won’t all be interchangeable. They can have totally different max power delivery, and a device is free to require more (up to 240W by spec). The nice thing about USB-PD is it’s negotiated and a device won’t (shouldn’t) try to pull too much power for a given plug. So as long as everyone sticks to specs, they’ll be interchangeable so long as the supply can supply enough. If it cannot, at least a device should keep itself off as if a chord isn’t plugged in, or preferably have some sort of “supply too low” sign.