[TriLUG] reason not to mix batteries in UPS

[David Burton via TriLUG]

Which one did you get, David?


On Sun, Jan 8, 2023 at 9:31 PM David Brain <dbrain at gmail.com> wrote:

> Hi,
>
> There are LiFePO4 batteries with the same form factor as SLA batteries -
> that have a battery management system built in and so im theory could be a
> drop in replacement - e.g (picking at random, there are many)
>
>
> https://www.amazon.com/stores/HowellEnergy/page/25E75BEA-EBC2-4EBD-BD0F-646755CECED9?ref_=ast_bln
>
> But there's mixed reviews about using them on a UPS - some UPS don't seem
> to 'like' them and so won't charge or accept them as non faulty.
>
> I tried one in a small UPS and so for it's been OK - but it's only been in
> use for a month or so.
>
> David.
>
> On Sun, Jan 8, 2023, 8:49 PM David Burton via TriLUG <trilug at trilug.org>
> wrote:
>
>> 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!
>> >
>> --
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>
>