Battery back up and replacements
Can you or anyone else recommend a specific model of UPS to buy?
You can also consider Eaton Powerware.
I picked up one a few years ago from these guys and the also sell the ups battery replacements.
They have 2 sites:
Access 8 - Eaton Powerware UPS
Lex Tec - 6V - 12V UPS Replacement Batteries, Battery Packs and Fuses for APC American Power Conversion, Tripp-Lite, Belkin, Powerware, Exide
Reasonable and easy to deal with.
FYI: They're not retail so just Mon-Fri.