These Daleks lived on Skaro. They are powered by static electricity from the floors of the city, because of this they were unable to leave the city or Skaro.
The main enemies of the Skaro Daleks were the Thals.
These Daleks only appeared in the 1963 TV story The Daleks.
Pictures above are from the TV story titled The Daleks
The only interest we have in the Thals is their total extermination!