This is a device that attaches to an a/c vent "register" and allows you to control the open/close lever remotely from a management console. The battery would be charged by a tiny wind turbine style generator that is built into the device and simply uses the air flowing out of the vent to spin it.
I think they should have used something like special wind turbine generators on the mars rovers as a backup for when their solar panels didn't have enough light, who knows.....they might still be running today. I'm kinda surprised that a bunch of super smart scientists didn't think of having this type of backup charging system, if they figure out how to deal with the dust, it would be an almost continuous source of power.