I am designing a small network deployment for several buildings without temperature regulation. In planning the power, I can find very little about acceptable UPS batteries for these conditions. Lead acid batteries won't handle the year-to-year temperature changes (potentially -10°F to 115°F [-23°C to 46°C] indoor at site), and I have found very little about alternatives that would be appropriate to provide for "turnkey" UPS solutions like a 2U rack-mount UPS (12V F1/F2 terminal).
It seems like there are a lot of batteries out there that do work in temperature extremes, but they haven't really reached the UPS market. There are some Lithium Ion and some Lithium Iron Phosphate batteries that claim to work with existing UPSs.
If I drop either of these types in a standard UPS (1, [2]) that is not quite rated for the temperature (most are rated for 22°F to 110°F [-6°C to 43°C] ), would this be safe and last a few years?
I also haven't found much discussion on these kind of scenarios, at least from a networking perspective. Is there any obvious information I am missing?
Update
I settled on including two thermostat switched 50W heaters in the cabinet, about 5 inches below the UPS. It is ventilated, but I think these should keep the batteries above freezing. Leaving this question open, as I don't think this is really an answer to my overall question.
Best Answer
The new Lithium batteries can withstand high temperatures and variations, compared to standard vrla batteries. The upfront capex is 3 times though.