Recent upgrades have installed power banks with USB charger ports into the under side of the main row seating benches. They're a bit recessed so keep a sharp eye.
The only consumer power outlets I found are a set of four chairs near gate K12. They have lots of 3 prong & USB power. Don't be shy; ask to plug in & share if there are ppl sitting there.
American Airlines customer service is disgustingly disrespectful. They don't give a sht about you and they don't try to hide it. I hate giving these people my money.
O'Hare International Airport is located 18 miles northwest of downtown Chicago. It's core mission is to provide outstanding service and amenities to customers.