The invention relates to a single cell (1) for a battery, comprising a first housing part (1.1) and a second housing part (1.2) that are electrically separated from one another by an insulating housing frame (1.3), wherein an electrochemically active material is arranged between the housing parts (1.1, 1.2) in the housing frame (1.3), wherein the first housing part (1.1) and the second housing part (1.2) are designed in a plate-shaped manner, wherein at least one of the housing parts (1.1) has a first edge region (4) angled inward and the first housing part (1.1) and the second housing part (1.2) are fastened in a form-fitting manner to the housing frame (1.3), which is designed as one part.