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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'What strange sensitivity! What an amazing development of science was manifested in every move and act and word of this Robot!' - Ray Cummings, 1931.
DIY Robot Scorpion Crushes It
'...it raised its front end off the ground and waved its antennae at them, then raised one armoured claw as if to snip them out of the sky.' - Neal Asher, 2008.
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'What strange sensitivity! What an amazing development of science was manifested in every move and act and word of this Robot!'
Orb Nomad Zero-Emission Electric Aircraft
'That explains how it was so easy for me to remain motionless in midair or to perch on a flagpole in imitation of a giant bird, even in the windy city of Chicago.'
DIY Robot Scorpion Crushes It
'...it raised its front end off the ground and waved its antennae at them, then raised one armoured claw as if to snip them out of the sky.'