The intermittency of renewable energy sources and the varying power demand throughout the day pose challenges for electrical grid stability as more and more renewable energy technologies are deployed. Existing solid oxide fuel cell technologies are slow in response to changes in current and voltage, and therefore cannot smooth out the difference between the power supply from renewables and the power demand. In this presentation, we will report a battery-like response as a new functionality incorporated into the fuel cell devices. It is realized by having in situ charge storage (e.g., metal hydrides) proximal to or integrated within the anode of the fuel cell. Electrochemical studies show a capacity density of 977 mAh g^-1 in a 90-hour stable discharge. In addition, a fuel cell-battery hybrid electrochemical device was designed, and the voltage was stable at 0.86 V in the fuel cell mode and 0.73 V in the battery mode for 100 cycles over a course of 75 hours. Fuel cell with a battery mode represents a promising approach for easing the integration of intermittent renewables and enabling grid stability.