Japanese robot security guards that run on fuel cells:
Sohgo Security Services Co., a major security firm, is currently developing a robot equipped with a fuel-cell battery that will work round the clock for one week without a recharge. The current model, Guard-Robo C-4, is powered by a conventional lead battery and works continuously for 2-1/2 hours after three hours of charging. It is designed to work as a receptionist while being charged and go on patrol a few times each night.
Talk about combinging two tech buzzwords into one gadget! Now if they just add built-in WiFi or could teach these robots how to blog.