Abstract: A method of assembling a button cell battery. The method includes positioning a free end of a grommet over a free end of a top, and a free end of a can over a top panel of the grommet. The can includes a skirt having a vertical first section extending from a top panel of the can, and an outwardly tapered second section extending from the first section. An inner diameter of the skirt in the first section is substantially equal to an outer diameter of the top panel. The method also includes resizing a put-together arrangement defined following positioning the can over the grommet and positioning the grommet over the top from a first, expanded configuration to a second, constrained configuration, where an inner diameter of the skirt in the second section is substantially equal to the inner diameter of the skirt in the first section following resizing.

Abstract: A housing for a button cell battery includes a top, a can and a grommet. The skirt of the can extends between a top panel and a free end, and includes a substantially vertical first section and an outwardly tapered second section. The first section extends from the top panel of the can. The second section extends from the first section. Upon assembly of the housing, a flow path is defined between an outer surface of the skirt of the grommet and the inner surface of the skirt of the can. The flow path allows air to escape during the assembly, thus minimizing the risk of gas being entrapped within the interior of the housing of the finished cell battery.