A fuel cell battery, comprising a chamber unit (1), an anode entrance (2) connected to the chamber unit (1), an anode exit (3), a cathode entrance (4) and a cathode exit (5). The anode entrance (2) is connected to a hydrogen source (11) and an organic fuel source (12) respectively through a hydrogen duct (9) and an organic fuel duct (10). Duct (9) and duct (10) are respectively installed with a hydrogen valve (13) and an organic fuel valve (14). An exit valve (20) is installed at the anode exit. This fuel cell battery combines the advantages provided by hydrogen fuel and organic fuel. The fuel cell battery can meet the dual requirements of operating on both high and low power. The fuel cell battery's design leads to low manufacturing costs, a simple structure, and easy implementation.