[TriLUG] reason not to mix batteries in UPS

[David Burton via TriLUG]

The whole point of a UPS is to improve reliability, so the *un*reliability
of their batteries is especially annoying.

I've considered replacing a 12v lead-acid battery with four LiFePO4
batteries, like these:

https://www.ebay.com/itm/203613239129

Has anyone on the list tried that?

LiFePO4 batteries are supposed to sacrifice some of the energy density of
"regular" lithium-ion batteries for much improved longevity.

Dave


On Sun, Jan 8, 2023 at 6:45 PM Joseph Mack NA3T via TriLUG <
trilug at trilug.org> wrote:

> On Sun, 8 Jan 2023, shay walters wrote:
>
> > I've become an advocate of replacement on a schedule rather
> > than waiting for them to die.
>
> Hi Shay
>
> well that's a good idea (didn't occur to me). This will save the house
> being filled with beeping noises, when I'm trying to sleep, until the new
> batteries arrive (as well as save me from swollen and leaking batteries).
>
> I used to do this with disks, but they last so much longer now that I just
> leave them till they fail (and they aren't failing).
>
> I've just put a note in the calendar on my phone.
>
> > I try to replace on a 3-year schedule, but I'm such a procrastinator
> > that the actual dates end up more like 4 (or 5) years - that's why I try
> > for 3.  :-)
>
> I've never got more than 2.5 years from a set of batteries. They're at
> 13.2V (I seem to remember) so they're not being charged hard. How to you
> get 5, 4 or even 3 years out of them? Is it the battery? (One of the
> Duracells leaked badly at 2.5yrs.)
>
> Joe
> --
> Joseph Mack NA3T EME(B,D), FM05lw North Carolina
> Don't upgrade a working machine - it won't work any
> better - it could work worse; it may not work at all.
> Homepage http://www.austintek.com/ It's GNU/Linux!
>