Metal aqueous battery including an anode current collector

A metal aqueous battery, comprising a double cell comprising a pair of single cells, each single cell comprising:

• an anode;
• a cathode;
• a separator interposed between the anode and the cathode;
• a plate comprising an internal space configured to accommodate the anode, wherein the internal space of the plate communicates with an outside via an opening formed in one surface of the plate;
• and
• an anode current collector seated in the internal space, wherein the anode current collector comprises a body having a shape of a container having an open upper part and a closed bottom surface so as to accommodate the anode,
• wherein the pair of single cells are stacked so that the cathodes face each other, and
• wherein a cathode current collector is interposed between the pair of single cells.