Lithium AAA cells?

[flash....]

Lithium AAA cells?

At all the local stores I visit, I can find Lithium AA cells but never Lithium AAA's.

Do they exist?
Where to get them?
Does anyone make Lithium AA's and AAA's that are rechargeable?

Also, (sorry for all the questions)
Is there such a thing as a 3v AAA cell?? ALK or Lithium?
Thanks

 

[flashfan]

Re: Lithium AAA cells?

To the best of my knowledge, Lithium AAA batteries are not available (at least to the general public). Hopefully this "oversight" will soon be corrected. There has been previous discussion on the board regarding this issue. I don't recall the exact topics, but you might want to do a search.

Sorry, can't comment regarding rechargeable lithiums--that would take someone more knowledgeable than I.

 

[Rothrandir]

Re: Lithium AAA cells?

i *think* energizer *might* be working on them, but people have said (and i don't really know anything about batteries) that it is much more difficult because of size, chemistry...whatever.

so basically, no, there are none available as of yet, and might not be for quite some time.

 

[ikendu]

Re: Lithium AAA cells?

Originally posted by flash....:
Does anyone make Lithium AA's and AAA's that are rechargeable?

<font size="2" face="Verdana, Arial">There are some lithium rechargeable coin cells (like the 2032) that I have seen some posts on. As far as I know, there are none in the AAA or AA size.

Lithium (ion) cells can be dangerous to charge and dangerous to discharge. When either charged too fast or discharged too fast, they can become unstable and explode. Many devices (cell phones, digital cameras, camcorders, laptops) are benefitting from the high energy storage of Lithium Ion (or now lithium polymer) and long shelf life because of inherently low self-discharge (NiMH have a relatively HIGH self-charge rate and need to be kept on trickle charge to make sure they are "fresh" when you need them).

However, where Lithium Ion cells are used, the manufacturer has to design the devices to very carefully control the charging circuit and the discharge cycle so that the Lithium Ion cells stay within their safe operation zone.

The difficulty with a general purpose form factor like AA or AAA is that you can't be sure where or how it might be charged (dangerous on that end). Plus...you can't be sure how they will discharge in the many, many devices that use this general form factor (dangerous on the other end).

So...no AA or AAA Lithium Ion (or polymer) cells yet.

You could beat this by building charge regulation circuitry into the AA or AAA cells themselves...but as you might imagine, the small size and the cost make this more difficult. I'm watching for posts about the rechargeable lithium coins cells with interest to see how this is possible without the dangers.

There is an LED light (the FreeLight) that incorporates a rechargeable coin cell that is available now. It may be that by keeping the batteries quite small...that this limits the difficulty naturally.

 

[highlandsun]

Re: Lithium AAA cells?

http://www.candlepowerforums.com/cgi-bin/ultimatebb.cgi?ubb=get_topic;f=6;t=000767

 

[flash....]

Re: Lithium AAA cells?

Bump to re-ask this part of my original question.
Is there such a thing as a 3v or higher AAA cell?? of any kind?

 

[EMPOWERTORCH]

Re: Lithium AAA cells?

I've seen some 1/2 AAA sized cells for use in car alarm remotes and the like... two of those would make 3V. This size of battery would be very useful as you could operate IR to yellowish-green LED's in a 1AAA sized torch without a booster.
A 2AAA sized torch would be able to power directly the remaining spectrum InGaN LED's including white and UV!

 

[Stingray]

Re: Lithium AAA cells?

What about these?
http://www.123av2.com/Batteries.asp

 

[Floating Spots]

Re: Lithium AAA cells?

I'm pretty darn sure this is a misprint.
I have found these before, but never contacted them.
The reason why - is in the model number.
91 is Energizer's way of denoting a AA battery.

Energizer's number for the lithium AA is L91BP-4, which is what they have listed on the lithium AAA page.

Sorry to spoil your fun.....

 

[Doug S]

Re: Lithium AAA cells?

Originally posted by flash....:
Bump to re-ask this part of my original question.
Is there such a thing as a 3v or higher AAA cell?? of any kind?

<font size="2" face="Verdana, Arial">Of any kind? Yes. I remember over 10 years ago receiving some samples of a Lithium thionyl chloride AAA cell. These are the very low current [1mA or so] memory backup types with a Voc = 3.68V. As I recall, these cells were around $15/each in small Qty.

 

[highlandsun]

Re: Lithium AAA cells?

You might try these guys too:
http://www.globalsources.com/MAGAZINE/LE/0211/NPLITE24.HTM

 

[flash....]

Re: Lithium AAA cells?

Well, So far... I have found this:
3.6v AAA at 110Mah.
http://www.gocontec.com/products/im010014.html

And this site has 1/2 AAA's at 1.2v@130Mah.
http://www.yuasa-battery.co.uk/Nicad.html
Could put these two together and get one 2.4v cell, but the 2.4v is really not enough to drive a Nicha. I really want to mod 3 Solitares I have without doing the 12v N cell thing.

How Long would a 3.6v 110Mah Nicad push a single Nicha at about 30ma?? 1 or 2 hours??
Or the complete other approach... Where to get a step up converter that would fit into a Solitare like a ARC AAA and utilize the standard AAA.

 

[vcal]

Re: Lithium AAA cells?

Originally posted by flash....:
Well, So far... I have found this:
3.6v AAA at 110Mah.
http://www.gocontec.com/products/im010014.html

And this site has 1/2 AAA's at 1.2v@130Mah.
http://www.yuasa-battery.co.uk/Nicad.html
Could put these two together and get one 2.4v cell, but the 2.4v is really not enough to drive a Nicha. I really want to mod 3 Solitares I have without doing the 12v N cell thing.

How Long would a 3.6v 110Mah Nicad push a single Nicha at about 30ma?? 1 or 2 hours??
Or the complete other approach... Where to get a step up converter that would fit into a Solitare like a ARC AAA and utilize the standard AAA.

<font size="2" face="Verdana, Arial">flash-that first contec offering is on closer inspection is really a shrink-wrap pack of 3 x 1/3 AAA.

The second offering from your Yuasa link (the 1/2AAA) is of some interest though......

 

[flash....]

Re: Lithium AAA cells?

Ahhh I might be on to something:
What exactly is a LITHIUM THIONLY CHLORIDE CYLINDRICAL BATTERY?? I received a nice reply from the company below that highlandsun reccomended.
The company is SHUN WO (HK) ENTERPRISE DEVELOPMENT CO. and they make a AAA 3.6V 600mah Lithium Thionly Chloride Cylindrical Battery.
Link: http://www.globalsources.com/MAGAZINE/LE/0211/NPLITE24.HTM
This would seem to be the perfect cell for the Solitare. How many folks would be interested in a cell like this? I am asking for pricing based on quantity now. I'll post when I get more.

 

[Doug S]

Re: Lithium AAA cells?

Originally posted by flash....:
Ahhh I might be on to something:
What exactly is a LITHIUM THIONLY CHLORIDE CYLINDRICAL BATTERY?? I received a nice reply from the company below that highlandsun reccomended.
The company is SHUN WO (HK) ENTERPRISE DEVELOPMENT CO. and they make a AAA 3.6V 600mah Lithium Thionly Chloride Cylindrical Battery.
Link: http://www.globalsources.com/MAGAZINE/LE/0211/NPLITE24.HTM
This would seem to be the perfect cell for the Solitare. How many folks would be interested in a cell like this? I am asking for pricing based on quantity now. I'll post when I get more.

<font size="2" face="Verdana, Arial">See my earlier post in this thread. These likely can deliver only a few mA. Ask your supplier about the maximum or pulse current capability of the cells you are considering.

 

[flash....]

Re: Lithium AAA cells?

I was under the impression that 600mah was 600mah??
If the cell could not produce the 600mah, then why would it have the rating?
I will ask the question and ask only for samples at this time to be sure this cell will perform as advertised.

 

[Jonathan]

Re: Lithium AAA cells?

A unit consisting of a current unit times a time unit is simply measuring a quantity of electrons. Such a unit could be an ampere-second, ampere-hour, milliamp-hour, microamp-year, etc.

The mAh rating does not tell you how much current a cell can deliver for 1 hour. It instead tells you the product of current times time for a cell under particular rating conditions, or in other words the number of electrons that the cell could deliver under the particular rating conditions.

In the case of these cells, they can only deliver a few mA before the internal resistance crashes the output voltage. However the cells _do_ have a very high mAh rating, and can thus deliver these very few milliamps for a very many hours. If you wanted to run a Nichia at 5mA, I bet that these cells could do so, for more than 100 hours. But I doubt that they could run a Luxeon at 300mA for 2 hours.

-Jon

 

[highlandsun]

Re: Lithium AAA cells?

Yah, this is the same chemistry that Tadiran and Saft use for their primary cells. They're rated for very low current drain. Of course, since you're talking about a Mag Solitaire, and presumably a 3mm LED, I think it's a good match, yes.

 

[flash....]

Re: Lithium AAA cells?

Thanks highlandsun...
It may be of a mute point as of now due to SHUN WO (HK) ENTERPRISE DEVELOPMENT CO's latest E-mail reply to me that these cells are not available at this time. (unknown when they will be ready.)
Ahhh the search continues....

Any hopes on the possibility of a similar regulator for the standard Alk AAA with the Solitare like the Arc AAA?
There must be a good way to use the solitare with out going to the 12v N cell with extended spring.
I guess I should just go and buy an Arc AAA but I now have several Solitares I wish to convert using the 3mm 9000+ Mcd Whites. I want to change these over to LED as Solitares as incandescents are pretty useless IMO.

Eric...