[Elecraft] KXBC3 charger question

[Mike Short]

Get regular 9v batteries and change them when you set your clocks to/from
daylight savings time

On Tue, Oct 5, 2021 at 16:07 Julia Tuttle <julia at juliatuttle.net> wrote:

> I'm using Energizer Ultimate Lithium batteries in my smoke detectors and so
> far they seem to last a long time.
>
> One risk is that their discharge curve is higher and flatter than alkaline
> and then drops precipitously at the end of their lifetime. Fortunately
> yours are hard-wired, so they should still be able to warn you.
>
> I'd say just try it and see how long it lasts -- surely batteries vary in
> shelf life and detectors vary in current draw.
>
> 73,
>
> Julie
>
> On Tue, Oct 5, 2021, 16:22 jerry <jerry at tr2.com> wrote:
>
> > I have a related questions about batteries discharging... Not really
> > about ham radio, all please feel free
> > to delete...
> >
> >    We have a *lot* of smoke detectors.  They are the kind that runs off
> > the AC, but each one has a backup
> > battery.  The other day, one started beeping...and beeping...and
> > beeping.  That momentary beep that says
> > "change my battery!".
> >
> >   Amazon couldn't get me batteries the same day.  And the beeping makes
> > it hard to sleep.  So I went to the garage
> >   and got one of a set of rechargeable lithium 9V
> > rectangulars that I had bought for test equipment - DMMs and such.
> >
> >    The old battery in the smoke detector was 7.88V.  The lithium - 9.4.
> > Installed it...and no beeps!
> >
> >    It's tempting to just load all the detectors with lithiums.  The
> > alkalines last a couple years.  Maybe a fully-charged
> > lithium would last as long... and then you recharge it?  If so, they'd
> > be a good deal.  If OTOH they only last a couple months,
> > that's NOT a good deal, because I'd have to get out the ladder etc every
> > time.
> >
> >                ??
> >                     - Jerry KF6VB
> >
> >
> >
> >
> > On 2021-10-05 11:08, Don Wilhelm wrote:
> > > Eddy,
> > >
> > > The most likely answer is that your batteries are self discharging.
> > > NiMH batteries will do that, although there are low self discharge
> > > batteries available that you should look into.
> > >
> > > 73,
> > > Don W3FPR
> > >
> > > On 10/4/2021 11:14 PM, Eddy - k6sdw wrote:
> > >>   I have a KX3 with the KXBC3 Nimh charger and Nimh batteries
> > >> installed. My
> > >> question is: What's the current drain on the NICADS when I store the
> > >> KX3
> > >> for long periods of time? The KX3 is primarily used for portable
> > >> operation
> > >> and when I put the KX3 on the bench the batteries are dead needing
> > >> recharging. I wonder if I should pull on AA battery out during
> > >> storage?
> > >>
> > >>
> > >
> > > ______________________________________________________________
> > > Elecraft mailing list
> > > Home: http://mailman.qth.net/mailman/listinfo/elecraft
> > > Help: http://mailman.qth.net/mmfaq.htm
> > > Post: mailto:Elecraft at mailman.qth.net
> > >
> > > This list hosted by: http://www.qsl.net
> > > Please help support this email list: http://www.qsl.net/donate.html
> > > Message delivered to jerry at tr2.com
> > ______________________________________________________________
> > Elecraft mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:Elecraft at mailman.qth.net
> >
> > This list hosted by: http://www.qsl.net
> > Please help support this email list: http://www.qsl.net/donate.html
> > Message delivered to julia at juliatuttle.net
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to ai4ns.mike at gmail.com
>