selected from the group of polypropylene polyethylene ethylenes or like compositions having carbon carbon double bands the olifinic modifier provides for tensile elongation and knit line development the olifinic modifier can be in the amount of 0 50 table 1 sets for the composition of the pps cell seal 12 table 1______________________________________pps cell seal composition______________________________________main composition polyphenylene sulfide pps optional compositions glass fiber 0 40 olifinic modifier 0 50 ______________________________________ fig3 illustrates a side view of the cell seal 12 where all numerals correspond to those elements previously described fig4 illustrates a cross sectional view of the cell seal 12 taken along line 4 4 of fig3 illustrated in particular is the truncated conical cavity 42 located o the underside of the cell seal 12 formed by a ramped surface 44 and a planar truncated surface 46 the ramped annular surface 40 is guided and accommodated by the inner wall of the cell can 16 along with the lower portion of the annular circumferential surface 20 and is allowed to flex inwardly due to the undercutting afforded by the ramped surface 44 and truncated conical cavity 42 to effect the seal fig5 illustrates a bottom view of the cell seal where all numerals correspond to those elements previously described fig6 illustrates a cross sectional view of the cell seal 12 taken along line 6 6 of fig1 where all numerals correspond to those elements previously described the cell 10 is formed by a plurality of components as illustrated and now described the cell 10 includes a cylindrical cell can 50 an extruded cylindrical cathode 52 engaged about the annular wall 54 and the planar bottom 56 of the cylindrical can 50 an absorber nonreactive separator 59 such as material sold by w r grace amp co engaging.