EntityQ372200· pop 6· linked from 18 articlesbackup batterySign in to savebattery that powers a system when its usual power source is unavailableConnectionsuninterruptible power supplyEntitynickel–cadmium batteryEntityElon MuskPersonInternational Standard Book NumberEntityvideo gameEntitySouth AustraliaEntityhard diskEntitybatteryEntityWayback MachineEntityrandom-access memoryEntityTeslaEntitymotherboardEntitypower stationEntityHewlett-PackardEntityBIOSEntitylithium-ion batteryEntityAmerican National Standards InstituteEntityInternational Electrotechnical CommissionEntitylithium batteryEntityprimary cellEntityCategoriesBackupBattery applicationsElectric power