In-seat 110V AC Outlet and USB Port
With our in-seat power outlets that adapt to all kinds of electrical plugs, business travelers can work efficiently on their laptops throughout the flight. AC outlets are available in all our Royal Laurel Class, Premium Laurel Class and Premium Economy Class, as well as in the Economy Class of 787, 777-300ER, A330-300 aircraft. Seats are built-in 110V, maximum output power is 100W.
The USB ports of 787, 777-300ER, A330-300 aircraft are for power charging only.
I'm sure that Econ has power ports but just not sure if
EVERY seat in Econ has them, but they might since BR32 uses newer 777s.