Battery question

[John]

I hear that in Japan there is a Lithium Ion battery that does not discharge (at
least it takes many years). How is this possible, and is this even possible?
I read about this battery on the web somewhere, but cannot cite the source at
this time.

If this technology were implimented here, then this would radically change the
PDA/cell phone industry.

Thanks,


John
-------
http://www.members.aol.com/crucifyself03/Rsteve/
If more and more people complained to the authorities about Steve Walz then he
may get the justice or the mental help he so desperately cries out for!

 

[CWatters]

"John" <crucifyself03@aol.comGWbush04> wrote in message
news:20041104021503.06125.00000041@mb-m23.aol.com...

I hear that in Japan there is a Lithium Ion battery that does not
discharge (at
least it takes many years). How is this possible, and is this even
possible?
I read about this battery on the web somewhere, but cannot cite the source
at
this time.

If this technology were implimented here, then this would radically change
the
PDA/cell phone industry.

err No. You are probably referring to a cell that has a low "self
discharge" rate. Most batteries loose their charge over time even when not
used. .

Alkaline batteries have a shelf life of about 5 years (eg approximately 90%
capacity remaining after five years "on the shelf")

Lithium batteries have a very long shelf life - 90% full after 10 years.

Nickel Cadmium cells have a short shelf life - 90% full after 24 hours!.

Nickel Metal Hydride cells can be even worse than Nicad I believe.

 

[Jim Thompson]

On Thu, 04 Nov 2004 19:15:28 GMT, "CWatters"
<colin.watters@pandoraBOX.be> wrote:

[snip]

Nickel Cadmium cells have a short shelf life - 90% full after 24 hours!.

I agree pretty much here, but

Nickel Metal Hydride cells can be even worse than Nicad I believe.

Not in my experience, they seem to hold up quite well, until
end-of-life, where they will dive nose in hours.

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice480)460-2350 | |
| E-mail Address at Website Fax480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

 

[John]

<< Nickel Cadmium cells have a short shelf life - 90% full after 24 hours!.

Nickel Metal Hydride cells can be even worse than Nicad I believe. >>


This is why my digital camera still uses Lithiums and wont downgrade to
rechargeables.


John
-------
http://www.members.aol.com/crucifyself03/Rsteve/
If more and more people complained to the authorities about Steve Walz then he
may get the justice or the mental help he so desperately cries out for!