The only FOUR working power outlets in Councourse B and C at ORD are located at each end, where the large departures and arrivals boards are. There are two in the floor at each end in front of two chairs. That is it, in my experience (and I transit ORD a good deal).

All the outlets under the unused gate counters are not powered. I've tried. I can't speak for the ones under the used counters, but darned if one of these days I'm not gonna try.

I've tried the handful along the walls where the bathrooms and lounges are, and no dice there, either (not to mention I don't want to sit on the floor in those areas).

The outlets in the interconnect between Terminal One and Terminal Two are also non-functional.

Concourse F does have working outlets in the floor, surprise surprise, so if I am catching a UAX flight or have a long layover, I run out to there. The Cinnabon in Councourse F also has working power, so I can try and get a quick recharge of my laptop's battery while I recharge my personal battery with a cinnabon and mochalottachill.