​KembaraXtra-Computer Terms – battery backup:


Battery backup refers to the use of a battery-powered power supply that provides electricity to a system when the primary power source fails. This backup power allows computers and electronic devices to continue operating temporarily during power interruptions or outages.


Battery backup can also refer to smaller internal batteries that maintain power to critical circuits when the main power is turned off. For example, many computers include a small battery that keeps the system clock running and preserves essential configuration data stored in special memory.