ELECTRIC POWER TOOL ARRANGEMENT

The invention refers to an electric power tool arrangement (100) comprising an electric power tool (10) with a housing (12), an electric motor (34) located inside the housing (12), a working element (22) protruding from the housing (12) and two or more battery units (36, 44) adapted to provide electric energy to the electric motor (34) for its operation. The electric motor (34) is connected to the working element (22) in order to impose a rotational and/or an eccentric working movement (130, 132) to the working element (22). One of the battery units is an external battery unit (36) and the at least one other battery unit is an internal battery unit (44). The electric power tool arrangement (100) further comprises a voltage converter unit (102) provided separately from the rest of the electric power tool (10) and releasably attachable and electrically connectable to the rest of the electric power tool (10) in place of the external battery unit (36), the voltage converter unit (102) being adapted to be connected to a mains power supply and to convert a mains voltage provided by the mains power supply to a voltage of the at least one internal battery unit (44). It is suggested that after attachment and electric contacting of the voltage converter unit (102) to the rest of the electric power tool (10) the voltage converter unit (102) provides electric energy to the electric motor (34) during its operation, and the voltage converter unit (102) is adapted to recharge the at least one internal battery unit (44).