Patent ID: 7507491

Claim:
A refillable fuel cell comprising: a casing; a cathode having a first surface and a second surface; at least part of the second surface being exposed to the atmosphere; an anode having a first surface and a second surface; a first chamber configured to retain liquid fuel, wherein the first chamber is defined at least partially by the first surface of the anode; and a second chamber configured to retain liquid electrolyte, wherein the second chamber is defined at least partially by the second surface of the anode and the first surface of the cathode, wherein the fuel cell is configured to be sealed in a substantially liquid-tight manner during at least a portion of its service life, wherein the fuel cell is configured to at least one of receive fresh liquid and discharge spent liquid via at least one resealable opening, and wherein the at least one resealable opening comprises two resealable openings each in fluid communication with one of the first and second chambers.