Patent ID: 7037620

Claim:
An electrical battery comprising: a plurality of voltage producing elements having positively charged elements and negatively charged elements; a battery case having the plurality of voltage producing elements therein, the battery case having a first sidewall and a second sidewall; a protrusion extending on an outer surface of the first sidewall, a portion of the protrusion being made of an electrically conductive material and electrically connected to one of the positively charged elements and the negatively charged elements; and a recess extending on an outer surface of the second sidewall, a portion of the recess being made of an electrically conductive material and electrically connected to the other of the positively charged elements and the negatively charged elements, wherein the protrusion and the recess are constructed and arranged such that the protrusion is shaped to be slidable into the recess and the portion of the protrusion made of an electrically conductive material is located vertically co-aligned with the portion of the recess made of an electrically conductive material.