pat no 5 069 419 dec 3 1991 j h jerman u s pat no 5 271 597 dec 21 1993 or w america u s pat no 4 969 938 nov 13 1990 and a 34 fluistor 34 semiconductor microactuator described in instruments and apparatus news ian october 1993 p 47 and electronic design nov 1 1993 p 34 in conjunction with a sealed fluid depolarized electrochemical cell especially a zinc air cell the sole means of entry of depolarizing fluid is through the valve on a chip the class of valves useful in this invention is broader than the jerman or america art or the 34 fluistor 34 semiconductor microactuator because the self contained micromachined valve essential to this invention can include modifications of the jerman or america art the expression 34 electrically activated thermally responsive valve 34 therefore includes the jerman art and like valves that include and importantly contain a cantilever deformable element an alternative design in this class of electrically activated thermally responsive valves is a valve that contains juxtaposed members secured at each of their correspondent ends which members are made of materials of different thermal expansion coefficients when one of these elements is heated preferably the member flexing more rapidly on application of heat the member bends and opens a gap between the members to.