2.CharactersofNiMHpowerbatteryandrequirementsonnegativeelectrodehydrogenstoragematerialsIncontrastwithordinarysmallNiMHbattery,NiMHpowerbatteryforautosworksinthemoreharshconditions.Hence,requirementsonthecomprehensiveperformancesofNiMHpowerbatteryarestrict.MaindifferencesbetweenNiMHpowerbatteryandordinaryNiMHbatteryinclude: