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Performance of Ni-MH batteries for the Mm(NiCoMnAl)5 alloy prepared by casting and melt-spinning techniques as negativeelectrode was studied. Different preparation methods show little influence on the capacity and internal resistance of the batteries, whiletheir discharge voltage plateau decreases after annealing the as-cast alloy and also decreases with increasing solidification rate of the alloysprepared by melt-spinning technique. The internal resistance, the alloys particle size of negative electrodes and the aluminum content inpositive electrodes were examined for the batteries during cycling. The results show that the cycling stability of the battery with the as-castalloy as negative electrode deteriorates due to the rapid pulverization and poor corrosion resistance of the alloy but could be improved afterannealing. Melt-spinning suppresses the pulverization and corrosion of the alloy and results in the prolonged cycle life of the batteries.