What UPS backup battery should I buy?

[Nikkelah Ghaz]

I live in a rural area and my power goes out frequently so I need a UPS to protect my system
I'm currently using a Cyber power 425VA I got from Best buy a couple of years ago. and its always done its job But Now I've upgraded my PSU to a EVGA G2 750w and now get an annoying overload tone when my PC is under load and I worry that it may be bad for my PC too.,
I assume there are some powerful enough that do not cost an arm and a leg but I really have no Idea what i'm looking at., some are like a $1000 and others $20
I just need one that can keep my Computer on long enough to shut it down if the power goes out I don't want to play games off of a battery or anything.
I turn off My PC when I sleep so an auto Shutdown feature is not necessary.
Mostly The power will just flicker off for about 15 seconds or so and i'd like one that could just keep me running so i don't lose my work or fry any of my hardware when the power fluctuates., I have about $100 max to spend but I'd really like to spend less if possible.,
thanks in advance for any guidance,
~Nik

 

[Recycled]

terry4563, I'm not selling anything here. I refurbish UPSes on the job, for my employer, who uses them and does not sell them.

 

[Nikkelah Ghaz]

What is your budget for the UPS?

about $100 I really can't spend more, Here is the one I'm thinking of getting http://www.newegg.com/Product/Product.aspx?Item=N82E16842102083
still haven't worked out if my pc will cause the annoying overload tone on this one when I'm working under load but I think its sufficient.,
I know its not quite as fancy and probably won't last as long as the ones you guys suggest but I really am pinching pennies right now
I really appreciate the time you guys have taken to answer my questions, don't think that I take it for granted I've definitely learned here,
Thanks

 

[terry4536]

Good luck. Just limit what you plug int it, and hopefully it will work for you.

Once you get it charged up, unplug it and time the battery time . That will give you a reference battery time.

 

[Nikkelah Ghaz]

thanks it about 2x the VA rating of the one I'm using now so i think it should work for me., the one i have now actually works most of the time the only problem with it is the loud tone that plays when i'm running some games or benchmarks or rendering that sort of thing I probably wouldn't have even noticed If I hadn't been testing my system its kind of weird since this is not even when the powers out or anything it would just beep out of nowhere I guess it must have like a max draw or something and the new GPU causes my pc to just use more power when doing those things, I don't know but I hate that sound lol
should be easy enough to reproduce the conditions once I have the new one installed to test for the tone
the battery itself has actually never been drained because I just save my work and shutdown asap. it would be interesting to see how long it lasts., but I'd have to survive its loud beeping lol
this is the only UPS I've ever owned and its been good to me even if it hates my ears which is one of the reasons i'm comfortable sticking with the brand

 

[terry4536]

We used them extensively at work. There were six or eight in just my area. So, we had plenty of notice every time the power blinked (alarms were going off everywhere). We used APC only by the way.