Robotics

Robotics is the branch of mechanical engineering, electrical engineering and computer science that deals with the design, construction, operation, and application of robots.
Robotics use batteries as a power source.
http://en.wikipedia.org/wiki/Robotics


Cybernetics is a transdisciplinary approach for exploring regulatory systems, their structures, constraints, and possibilities. Cybernetics is relevant to the study of systems, such as mechanical, physical, biological, cognitive, and social systems.
Cybernetics use No Risk Renewable Power Supply.
 http://en.wikipedia.org/wiki/Cybernetics

Artificial intelligence (AI) is the intelligence exhibited by machines or software. It is an academic field of study which studies the goal of creating intelligence.
Artificial Intelligence based Battery Power Management for solar PV and Wind Hybrid Power System.