An electrochemical cell comprising: a cell housing comprising: i) an air chamber; ii) an air chamber air inlet; iii) an air chamber air outlet; iv) an electrolyte chamber, an ionically conductive liquid electrolyte in the electrolyte chamber, wherein a gas space is defined in the electrolyte chamber above the electrolyte and has a cell gas; an oxidant reduction electrode for reducing a gaseous oxidant between the air chamber and the electrolyte chamber, a fuel electrode comprising a metal fuel at least partially within the electrolyte chamber; a mist elimination system configured between the electrolyte chamber and an exhaust vent to separate the cell gas from a mist comprising the ionically conductive liquid electrolyte; wherein the mist elimination system is configured above the volume of ionically conductive liquid electrolyte; the mist elimination system comprising: a spill prevention device; a hydrogen recombination portion, comprising a hydrogen recombination catalyst configured to react with hydrogen gas within the cell gas and form water; a filter body portion comprised of at least one layer of filter media for capturing said mist; a neutralizer portion comprising a neutralizer media configured to react with and neutralize the ionically conductive liquid electrolyte contained within the mist; and wherein the filter body portion contains pores to permit permeation of said cell gas therethrough, and wherein the neutralizer portion is configured downstream of the hydrogen recombination portion, the filter body portion, and the spill prevention device. a cell housing comprising: i) an air chamber; ii) an air chamber air inlet; iii) an air chamber air outlet; iv) an electrolyte chamber, an ionically conductive liquid electrolyte in the electrolyte chamber, wherein a gas space is defined in the electrolyte chamber above the electrolyte and has a cell gas; i) an air chamber; ii) an air chamber air inlet; iii) an air chamber air outlet; iv) an electrolyte chamber, an ionically conductive liquid electrolyte in the electrolyte chamber, wherein a gas space is defined in the electrolyte chamber above the electrolyte and has a cell gas; an oxidant reduction electrode for reducing a gaseous oxidant between the air chamber and the electrolyte chamber, a fuel electrode comprising a metal fuel at least partially within the electrolyte chamber; a mist elimination system configured between the electrolyte chamber and an exhaust vent to separate the cell gas from a mist comprising the ionically conductive liquid electrolyte; wherein the mist elimination system is configured above the volume of ionically conductive liquid electrolyte; the mist elimination system comprising: a spill prevention device; a hydrogen recombination portion, comprising a hydrogen recombination catalyst configured to react with hydrogen gas within the cell gas and form water; a filter body portion comprised of at least one layer of filter media for capturing said mist; a neutralizer portion comprising a neutralizer media configured to react with and neutralize the ionically conductive liquid electrolyte contained within the mist; and wherein the filter body portion contains pores to permit permeation of said cell gas therethrough, and wherein the neutralizer portion is configured downstream of the hydrogen recombination portion, the filter body portion, and the spill prevention device. a spill prevention device; a hydrogen recombination portion, comprising a hydrogen recombination catalyst configured to react with hydrogen gas within the cell gas and form water; a filter body portion comprised of at least one layer of filter media for capturing said mist; a neutralizer portion comprising a neutralizer media configured to react with and neutralize the ionically conductive liquid electrolyte contained within the mist; and