In Resurrection of the Daleks these Daleks rescued Davros from a prison ship. After the rescue Davros betrayed them and hoped to create new Daleks. A group of Renegade Daleks survived.
These Renegade Daleks appeared in the TV stories Resurrection of the Daleks, Revelation of the Daleks and Remembrance of the Daleks.
Pictures above are from the TV story titled Resurrection of the Daleks
Pictures above are from the TV story titled Revelation of the Daleks
Pictures above are from the TV story titled Remembrance of the Daleks
You are my prisoner. You will obey all instructions or you will be exterminated!