Fig. 3 shows the discharge curves of the cylindrical batteries at various currents. The battery specifications are equivalent except for the alloy used as the negative electrode. An approximate 1.2 V discharge voltage and 99% of its rated capacity were observed for the battery containing alloy#1 at the 1C rate. The current value at the nC rate (n: positive number) was determined by multiplying the rated battery capacity and the n value. Even at the 10C rate, an approximate 1.0 V voltage and 88% of its rated capacity was maintained. At the 10C rate, a 200 mV difference was observed for the discharge voltage between both batteries. A comparatively good high-rate discharge performance was obtained using alloy#1