NOVELTY - A metal-gas cell battery comprises metal-gas cell(s) (12), a positive battery terminal electrically connected to gas cathodes (I,II) and a negative battery terminal electrically connected to a metal anode. The cell comprises parallel retaining structures (I,II), gas cathodes (I,II), a soft pocket (24), a soft pocket closing mechanism, a metal anode, protective meshes (I,II) and separator sheets (I,II).    USE - As mechanically rechargeable metal-air cell battery, such as zinc-air cell battery (claimed), e.g. for electric vehicle.    ADVANTAGE - The metal-gas cell battery is conveniently recharged by mechanically replacing the metal anode. The battery eliminates expensive and labor-intensive operation of changing and washing the separator bags. The battery prevents leakage of electrolyte or electrolyte mist and is durable for several refueling operations.    DETAILED DESCRIPTION - A metal-gas cell battery comprises metal-gas cell(s), a positive battery terminal electrically connected to gas cathodes (I,II) and a negative battery terminal electrically connected to a metal anode. The metal-gas cell comprises parallel retaining structures (I,II), gas cathodes (I,II), a soft pocket disposed between the cathodes, a soft pocket closing mechanism, a metal anode (28) disposed within a soft pocket chamber (26), protective meshes (I,II) and separator sheets (I,II).    The structure (II) is proximate to the structure (I) and is movable with respect to the structure (I) between retaining structure positions (I,II). The structure (II) is spaced apart from the structure (I). The cathodes (I,II) are disposed within rigid planar retaining structures (I,II), respectively. The cathode (I) (18) is permeable to gases but impermeable to liquids and the cathode (II) is permeable to air but impermeable to liquids.    The cathodes allow the passage of gases into the cell and the cathode (II) is electrically connected to the cathode (I). The soft pocket has a flexible and planar walls (I,II) having respective top edges. The periphery of the wall (I) is connected to the periphery of wall (II) except along the respective top edges. The periphery of the walls (I,II) are attached to the structures (I,II), respectively. The structures, cathodes and the walls form a liquid retaining soft pocket chamber having a lower portion, an upper portion and a top opening (44) between the top edges of the walls. The top opening is open when the structures are in position (II) and tightly closed when the structures are in position (I). The closing mechanism secures the structures in the position (I). The meshes (I,II) are disposed between the cathodes (I,II) and walls (I,II), respectively. The sheets (I,II) is permanently installed between the cathodes (I,II) and meshes (I,II), respectively.    INDEPENDENT CLAIMS are also included for the following:    (1) zinc-air cell battery containing several internal zinc-air cells between outermost zinc-air cells (I,II), a positive battery terminal electrically connected to air cathodes (I,II) of cell (I) and a negative battery terminal electrically connected to zinc anode of cell (II). Each cell comprises structures (I,II), air cathodes (I,II), soft pocket, soft pocket closing mechanism, zinc anode wholly disposed within a soft pocket chamber, protective meshes (I,II), separator sheets (I,II) and a semi-permeable membrane. The semi-permeable membrane is in the upper portion of the pocket chamber to allow gases to flow out of the upper portion. The membrane is permeable to gases but impermeable to liquids. The anode comprises a planar anode base portion (58) having a lower edge (72) which is shorter in length than upper edge (74), and a tab portion (62). The tab portion in each internal zinc-air cell is electrically connected to air cathodes of adjoining zinc-air cell by a conductor component. The component has a portion in abutment with the tab portion; and    (2) metal-gas cell.    DESCRIPTION OF DRAWING(S) - The figure shows a perspective view of a metal-gas cell.    Metal gas cell (12)    Gas cathode (I) (18)    Soft pocket (24)    Soft pocket chamber (26)    Metal anode (28)    Top opening (44)    Support structure (56)    Base portion (58)    Tab portion (62)    Lower edge (72)    Upper edge (74)