Now we have an Industrial Robots with the new mechanical arm and hand uses very low energy then old power-hungry Industrial robots.
The arm is supported by adjustable springs that counteract both its own weight and that of the object it is holding, so its motors need less power to hold and move objects. The smaller motors also make the arm lighter, and so less dangerous if it hits a worker.
The hand has three fingers, each with two segments, and is controlled by cables attached to a motor in the wrist.
The motor is delicate enough that it can even handle objects as fragile as tomatoes and eggs.
Also Delft University of Technology in the Netherlands is working to improve the artificial limbs.