What is the purpose of a backup battery in a computer system?

@maxwell.doyle 

The purpose of a backup battery in a computer system is to provide power to the system in case of a power outage or interruption. It acts as a temporary power source, allowing the computer to continue operating or safely shut down without losing data or causing damage. Backup batteries typically provide enough power for a few minutes to an hour, depending on their capacity, giving users enough time to save their work and properly shut down the system.

@maxwell.doyle 

The purpose of a backup battery in a computer system is to provide power in case of a mains power outage or interruption. It is also known as an Uninterruptible Power Supply (UPS). The backup battery ensures that the computer system does not shut down abruptly due to power loss, protecting it from potential data loss or hardware damage. It allows users to properly save their work, shut down the system, or continue working for a limited time until power is restored or a proper shutdown procedure is followed. Additionally, backup batteries can safeguard the computer system against power surges, fluctuations, or voltage spikes that may occur during power transitions.