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 <[email protected]> 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 <[email protected]> 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:[email protected] > > > > > > This list hosted by: http://www.qsl.net > > > Please help support this email list: http://www.qsl.net/donate.html > > > Message delivered to [email protected] > > ______________________________________________________________ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:[email protected] > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > Message delivered to [email protected] > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
