What you'll require here is about 30 minutes' endurance, a $10 budget, and a good reason why you'd want to swap some good old versatile wall plugs in for USB-only power outlets. Once you've got all that sorted, it's a quick skip to the source link, where you'll get step-by-step instructions on converting to "the future" of power distribution. And hey, just to help you justify all that expenditure of effort, we've got a whole category devoted to the cornucopia of most awesome devices you can power via USB. Kudos gained for clever design, kudos lost for relatively redundant outcome.