Reusable reserve battery system

Control valve actuated pneumatic means to evacuate electrolyte from a storage battery cell to an adjacent storage compartment and to return said electrolyte to said cell when desired comprising a storage compartment mounted over and adjacent to a battery cell, said storage compartment being connected to said cell by pipe means extending to a lower part of said cell, said storage compartment having a combination vent and float valve means activating a shut-off valve and a removable filler cap or plug, air pressure supply means piped to said control valve means thence into the top of said battery cell so that when said control valve is turned ON a supply of air under suitable pressure will be introduced into the top section of said cell thus forcing electrolyte downward and through said pipe means into said storage compartment until a level is reached sufficient to close said vent valve and stop further influx of electrolyte into said compartment and influx of air into said cell where maintenance of air pressure will keep electrolyte in said storage compartment until such time as said air control valve is turned OFF permitting said electrolyte to return to said cell under gravity and air pressure with the release of pressure in said cell.