A WORKING MACHINE, A WORK ATTACHMENT AND A COMBINATION THEREOF

A working machine includes a work attachment connection arrangement configured to operationally connect to the working machine a work attachment provided with a work tool; and a control system configured to control the operation of the working machine and to control the operation of the work attachment. The working machine further includes: at least a first electric motor; a first rechargeable battery; an electric power circuit connecting the first electric motor and the first rechargeable battery, wherein the work attachment connection arrangement includes a first electrical connector, wherein the first electric connector is configured to be connected to a corresponding electrical connector connected to an auxiliary rechargeable battery