UPS with Lithium batteries worth the cost?

I am putting together a list of UPS's that I want for some of our sites to keep the network/phones up during small outages. I see that Eaton sells some models with lithium batteries for a bit more money. Is this a no brainer? Is lithium the way to go?

I hate UPS maintenance. Batteries are heavy, I'm getting older. The years just fly by. Any advice? I haven't dug deep into this, some of the bigger UPS may need to remain lead acid.

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THANKS!