Need help with UPS & battery replacement

[rageofthepeon]

Currently I live on university housing and get power 'flickers' from time to time. My computer restarts instantly after being shut down each time it happens. I'm looking for something to protect my computer and prevent these random shutdowns.

This has lead me to buying a UPS and I'm currently leaning towards this model:

CP1500PFCLCD PFC Compatible 1500VA 900W Pure Sine Wave Tower UPS
http://www.amazon.com/gp/product/B00...=ATVPDKIKX0DER

I realize that the batteries will recharge themselves until they eventually wear out upon which I'm going to have to buy a replacement. The problem is I haven't been able to find any specific UPS batteries for this model.

Would I be able to use any 12V/8.5AH for a replacement? Could it be a slightly higher or lower V/AH such as this 12V/9AH CSB battery?

http://www.amazon.com/Sealed-Battery...d_rhf_dp_p_t_2

Completely new when it comes to UPS's and I don't want to mess up and buy something I can't replace the batteries a year or two down the road. Thanks in advance .

Edit: I'm a derp, just found some werker brands at batteriesplus.com. Question still stands about using different V/AH though.

 

[vailr]

The 1000VA model should be adequate (allowing ~5 minutes of run time) for one PC with an LED monitor.
The batteries should last for 3 years at least, since that line of UPS's are designed for "pure sine wave" output.
As you may be aware: non-sine wave output UPS's + "active PFC" PC power supplies can degrade UPS batteries more quickly.
"Slightly higher or lower V/AH" batteries should be OK, as long as the battery's physical sizing allows fitting inside the UPS. The exact battery terminal tab sizing is also a consideration.