A button cell includes a housing having a metal cell cup and a metal cell top. An electrode winding disposed within the housing is formed from a multi-layer assembly that is wound in a spiral shape about an axis, the multi-layer assembly including a positive electrode formed from a first current collector and a negative electrode formed from a second current collector. A separator is disposed between the electrodes. The first current collector includes a first end section bent so as to extend out of the electrode winding forming an uncoated first flat layer adjacent to the electrode winding. An insulator is positioned (i) between the first flat layer and the first end side of the electrode winding or (ii) between a second flat layer and a second end side of the electrode winding.