Quote Originally Posted by boybi View Post
Aside from the expensive APC UPSes, what other UPS brands can you recommend?

I just got 2 generic UPS from my local PC shop, brand: Elite. My problem with this UPS is it shuts down after a few minutes even if the battery can still last longer. I want my devices to stay ON as long as possible, but I cannot do it with this UPS.
You can extend the operating time of a typical UPS on battery mode by replacing the original small 12volt battery with a large car or deep cycle battery. Downside is recharging a depleted battery will take a long time but if the power outage is not often (not daily), the original charging circuit should be enough.

A few years back, I had a modified UPS capable of running over six hours. My brother had a larger battery and can run his PC for eight hours.