[Elecraft] Experience with Energizer Lithium AA Batteries?

[Matthew Cook]

Walter,

Like all primary cells they do have some ESR which is a little higher than
other secondary cell chemistries.

Like Julia I have pushed these cells towards 1A/cell at -30 celsius and
achieved reasonable results and the load curve is very flat.

The additional terminal voltage is good for overcoming some of the ESR
problems at high load, but if the final amplifier is prone to distortion or
AM modulation due to voltage drop then things get a little more difficult.

The proof is in the pudding, so I'd simply purchase a set, place your
multimeter across the cells (maybe use a RF choke if TX not into a dummy
load) and watch the terminal voltage when you TX with your desired
modulation, you'll quickly know if you have a problem.

If your experiment is unsuccessful the E2 energisers go forever in your
remote controls and wireless mouses, they will certainly not be wasted !

73

Matthew
VK5ZM


On Fri, 12 May 2023 at 02:15, Walter Underwood <wunder at wunderwood.org>
wrote:

> Thanks, that is actually on the data sheet, now that I look.
>
> https://data.energizer.com/pdfs/l91.pdf
>
> My biggest concern is whether they hold up under a 2+ A current draw. The
> data sheet stops at 1 A.
>
> wunder
> K6WRU
> Walter Underwood
> CM87wj
> http://observer.wunderwood.org/ (my blog)
>
> > On May 9, 2023, at 9:10 PM, Matthew Cook <vk5zm at bistre.net> wrote:
> >
> > Walter,
> >
> > These cells have a slightly higher terminal voltage 1.82 c.f 1.65 (when
> full) from your normal heavy duty alkaline battery... flat is still the
> same at 1.0V under load discharge curve is what you'd expect under
> moderate/high loads.
> >
> > We regularly fly these (and only these cells) in our high altitude
> balloon experiments at reasonable currents (> 200mA), so at temperatures
> below zero celsius (+32F) they still have significant usable capacity.
>  They will certainly give your Enerloops a run for their money.
> >
> > 73
> >
> > Matthew
> > VK5ZM
> >
> >
> > On Tue, 9 May 2023 at 06:04, Walter Underwood <wunder at wunderwood.org
> <mailto:wunder at wunderwood.org>> wrote:
> >> I’m considering taking Energizer Ultimate Lithium AA batteries
> (non-rechargeable) in my KX3 on a backpacking trip. They are half the
> weight of Eneloop Pro and have about 40% more Watt-hours of energy.
> >>
> >> Anybody tried these? How did they work?
> >>
> >> wunder
> >> K6WRU
> >> Walter Underwood
> >> CM87wj
> >> http://observer.wunderwood.org/ (my blog)
> >>
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