Battery pack for a portable power tool

The invention describes a battery pack (100) for a portable power tool (300) comprising a cell holder (600) which receives at least one battery cell (400), wherein the battery cell (400) comprises a to a longitudinal axis (x) parallel lateral surfaces (405) , wherein the outer surface (405) of two perpendicular to the longitudinal axis (x) end faces (410) is delimited, and wherein the outer surface (405) and the end faces (410) form an outer shell of the battery cell (400), and wherein a battery Pack electronics (800). The battery pack electronics (800) comprises at least one printed circuit board (810) with contact elements (140) for producing an electrical connection between the battery pack (100) and the handheld power tool (300), further wherein at least one of the battery cell (400) corresponding contact means (840 is provided), said contact means (840) electrically contacts the corresponding battery cell (400) (on the lateral surfaces 405).