I have a UPS that will power my desktop computer for 50 minutes. The idea was that if the power when out I could save/make notes on what I'm working on and then shutdown or hibernate the desktop. But when the UPS looses power from the grid Windows 7 on my desktop goes into hibernate almost immediately.
I have the following settings:
Critical battery action: hibernate Critical battery level : 30% Low battery level : 40% Reserve battery level : 20%
It's also INCREDIBLY annoying to have to dive 17 miles to the office and back to just press the power button so I can fix an after hours issue that I could otherwise fix from home. All because there was a 30 second power outage.
I would use the APC's PoiuerChute but it doesn't support hibernation. Just shutting down. :S
More info: The Windows power utility is reporting the battery level correctly. (I'm doing the test again just to double check.)
After getting things working, a Windows update killed it again. So I just unplugged the cable. It was more trouble then it was worth.