A battery pack for supplying power to an electrical device has a plastic housing having a housing wall with at least one wall section, at least one battery cell which has an outer circumference and is inserted into the housing so that the at least one wall section of the housing wall faces said outer circumference surface of the battery cell, the wall section of the housing and the circumference surface of the at least one battery cell being complementarily shaped along at least one quarter of a circumference of the at least one battery cell and resting against each other in a form-locked manner.