Add self-charging to this cute little Nao robot's feature list. In the following video, Nao sidesteps delicately to his charger, then walks out a bit to relax while charging.
When done, the versatile Nao robot flicks the charger cable out with a simple hand gesture, thoughtfully shown in slow motion in the following brief video.
The first mention of self-charging robots, as far as I know, is in the delightfully manic 1960 short story Callahan and the Wheelies by Stephen Barr:
... It turned its photoelectric scanners this way and that, waving its jointed grappling arms about. Then it appeared to make up its mind, and trundled over to a wall socket in the baseboard, plugged itself in and proceeded to recharge itself.
(Read more about the self-charging robot)
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A System To Defeat AI Face Recognition
'...points and patches of light... sliding all over their faces in a programmed manner that had been designed to foil facial recognition systems.'