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> On Mar 6, 12:54pm, Guy Farrell wrote:
> > Subject: Are Lithium Ion batteries avail...
> > I have an old 350 with a _very_ dead Ni-MH battery. Unless someone
> > knows a method for rejuvination...Where and $ for Li Ion replacement?
> >-- End of excerpt from Guy Farrell
>
> Lithium Ion batteries are still not ready for prime-time.
>
> There is a serious problem with the chemical stability in current Lithium Ion
> batteries, such as the Sony batteries which Dell uses. These batteries have
> very short life-span, and only a marginally better current density.
So how's Toshiba doing with their little lithium-ion batteries
that are in its small subnotebooks (that use the Trackpoint)?
In addition to your above comments, my father (who was a design
engineer for a major battery producer as recently as a year ago--they
make batteries for lots of the biggies to put their names on, including
Motorola's radios & cellular phones) made a very disappointing statement
to me.
It seems that those of us who use ThinkPads with NiH batteries
are not likely to benefit from the perfection of a lithium-ion battery. The
reason is that lithium-ion batteries require a very different charging
cycle methodology than do NiH or NiCd. Hence, unless you can change the
way the ThinkPad sends juice to the battery for recharging (not likely--
that's the kind of thing that is hard-wired), than it won't be able to
use a lithium-ion battery. Time to buy a new computer designed to handle
the new kind of battery. ;)
The good news is that perhaps farther into the future there is
a truly *fascinating* battery technology coming available (no, I'm not
talking about Zinc-Air). Tentatively, they were calling it
"Lithium-Polymer". The beauty of Lithium-Polymer is that it not only
has a higher current density, but is *far* more flexible in terms of
its form factor. Current battery technologies are *very* dependent
on arranging the various cells in a particular physical way. Polymer
will do away with that necessity, allowing very odd and strangely-shaped
batteries to be available, and making things like notebook-computer
design much more flexible as well.
----- _____________________________
Randy Whittle whittle@usc.edu | I don't recycle. |
USC School of Business (Fight on, 'SC Trojans!) | I'm a consumer; |
(My opinions are mine, but since I'm | dammit-- |
right, they should be yours too.) | I consume! |
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