New type of battery / New type of battery

A new form of triangular prism battery, instead of generally cylindrical battery, Produces the moisture using the battery interior which the electricity creates to cause the cobaltous chloride indicator paper to have the change, to provide battery power display, This trihedral prism shape is an equilateral triangle, three angles all are smaller than 90 degrees, Therefore not easy to roll in any smooth tabletop and the outdoors sod.