<P> In 1886 , Carl Gassner obtained a German patent on a variant of the Leclanché cell , which came to be known as the dry cell because it did not have a free liquid electrolyte . Instead , the ammonium chloride was mixed with plaster of Paris to create a paste , with a small amount of zinc chloride added in to extend the shelf life . The manganese dioxide cathode was dipped in this paste , and both were sealed in a zinc shell , which also acted as the anode . In November 1887 , he obtained U.S. Patent 373,064 for the same device . </P>
<P> In 1886 , Carl Gassner obtained a German patent on a variant of the Leclanché cell , which came to be known as the dry cell because it did not have a free liquid electrolyte . Instead , the ammonium chloride was mixed with plaster of Paris to create a paste , with a small amount of zinc chloride added in to extend the shelf life . The manganese dioxide cathode was dipped in this paste , and both were sealed in a zinc shell , which also acted as the anode . In November 1887 , he obtained U.S. Patent 373,064 for the same device . </P>
when was the first dry cell battery invented
when was the first dry cell battery invented
1886
1886