this post was submitted on 28 May 2026
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I have 2 UPS' that have expired batteries. The manufacturers want crazy amounts of money to replace them, and a friend recommended I look online to see if I can get them elsewhere. However, the sites all seem so sketchy. Have any of you had good luck with third party battery sites? Obviously a bit nervous about safety.

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[–] IcedRaktajino@startrek.website 3 points 2 weeks ago* (last edited 2 weeks ago)

A few years ago I decided to try the lithium-ion UPSs. I'm on my 3rd year with them, and I will never go back to lead acid. I've got one "classic" UPS that is still in good shape as long as you don't try to run more than 100w from it, but when it goes, it goes.

These use the LiFePO4 batteries, and I get close to twice the runtime as my old ones, and they don't drop from 80% to 10% like lead acids do. The battery chemistry is also good for about 10 years of daily cycling, so assuming the electronics hold out, they seem like they'll last.

The only hiccup with the model I got is it doesn't have a serial monitor connection, but you can probably fine plenty that have it.