What are telecom sites using for backup power these days?

[katesheldon]

I work for a small telecom operator, and we're finally looking to upgrade the aging backup battery systems at some of our remote sites. We've been dealing with a lot of lead-acid replacements and the maintenance is becoming a real headache.

I'm trying to get a feel for what's actually working in the field now. Is everyone moving towards lithium-ion, or are there other reliable solutions? I'm especially interested in options that are lower maintenance and can handle wider temperature ranges.

I was doing some initial research and found a place like National Battery Supply that seems to have a variety of options, but I'd love to hear from real-world experience first.

What solutions are you all using for your cell towers or remote cabinets? Any major pros or cons you've encountered?