A bipolar cell unit is described for use in a metal/air battery, e.g. an aluminum/air battery. Each bipolar cell unit comprises (a) an air cathode having opposed major surfaces, one of the surfaces being exposed to air and the other of the surfaces being adapted for exposure to electrolyte, (b) a metal...http://www.google.com/patents/US4988581?utm_source=gb-gplus-sharePatent US4988581 - Metal-air bipolar cell unit