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Shuhei Yoshida, Sony President of Worldwide Studios, has confirmed via Twitter that the PlayStation 4 will not use a power brick. Instead, the power supply will be housed internally, not unlike the Xbox One.
Additional details regarding the PlayStation 4's power supply and how the company managed to fit it within the console's relatively small casing are still unknown, but at least we have a better idea of what Sony has in store for us later this year.
~ Source