backup battery
Portable energy reserve
A backup battery is a secondary power source that activates when the primary power fails.
Devices like smoke detectors, alarm systems, and uninterruptible power supplies use backup batteries to maintain operation during outages: The security system has a backup battery that lasts eight hours.
Also called a reserve battery.
- reserveSupply kept back
- powerEnergy transfer rate
- power bankMobile device battery backup
- chargerPower-restoring device or mount
- charging stationBattery replenishment facility
emergency · UPS · portable · lithium · cell · juice · recharge · surge · outage · power outage · flashlight · inverter · generator · off the grid · laptop · phone · dead phone · energy
- spare partsspare tire, spare key, spare wheel
- batteriesAAAA, D cell, 9-volt, C, D
- charging stuffcharger, adapter, cord, plug, outlet
- homesteadinghomesteading, self-sufficiency, off-grid living, off-grid, chicken coop
- safeguardssafeguards, safety valve, protections, kill switch, defenses
- power electronicsinverters, power converter, rectifiers, voltage converter, converters