Abstract: Embodiments of the present invention relate to a system for processing battery waste. The system comprises a decomposing device for mechanically decomposing the battery waste to a, in particular strip-shaped or flake-shaped, lightweight portion and a heavyweight portion. The decomposing device comprises an outlet for commonly discharging the lightweight portion and the heavyweight portion. The system further comprises a separating unit for separating the lightweight portion from the heavyweight portion, wherein the separating unit is coupled with the decomposing device for receiving the lightweight portion and the heavyweight portion. The system further comprises a fiber compactor unit, wherein the fiber compactor unit is coupled with the separating unit for receiving the lightweight portion. The fiber compactor unit is configured for compacting the lightweight portion under a separation of a further active material.