The better batteries last 3-5 years. Do you think you might be getting a shorter life with yours because you're using the cheap batteries? Also, have you actually load tested the cheaper batteries?
M
Original equipment batteries should be lasting between 3-5 years. However, the abuse they take shortens their life. If they don't get discharged completely very often they can last a long time. Sometimes people get shocked that their batteries don't last 3 years on a brand new unit with very few...
That's a pretty straight forward set up. You might as well add your cable modem and router to the mix so you'll have internet when it goes down. I'd recommend a Smart UPS 1000. It would provide you power protetion, some run time and power filtering in case of surges, spikes and all sorts of...