If you have an uninterruptible power supply (UPS) to provide battery backup for a Microsoft Windows system in the event of a power outage, you may want to change the default setting for the action that Windows takes when the battery charge is nearing depletion. The default setting is to put the system in sleep mode where the system saves the memory state to disk and stops most activities on the system, so that the system is using very little power. But, if the battery charge becomes totally depleted, if a system is in sleep mode when that happens, you will lose any unsaved work. You can reconfigure Windows to hibernate the system, instead. When the system goes into hibernation, the contents of memory are saved to disk in such a way that when the system is rebooted, you will be back to the state it was in before it was hibernated, so you haven't lost unsaved work, such as open documents in a word processor, etc.
[ More Info ]