Having plural layers of diverse material 142 . . Having plural distinct components 143 . . . Ribs or projections attached to sheet material 144 . . . Plural layers 145 . . . . Having electrode spacing projections 147 . . .
Projections are deformed portions, of a sheet material, i.e., corrugations, etc.
Plural housing having spacing means or channels for air circulation and short prevention 149 . Plural cells 150 . . With integral switch means 151 . . Casing having interlocking structure 152 . . Individual cells connected in repeating contiguous layered units 153 . . .