Do all NiMH batteries have a limited useful life (technical and political)
- From: hhc314@xxxxxxxxx
- Date: Sun, 22 Jul 2007 15:29:11 -0700
I don't know about others, but my experience is that NiMH batteries
(which I use in 4 of my hand-held power tools) are not only very
costly, but have a useful lifetime of only 2 years. At that point
their charge capacity drops to roughly 25% of when new, and their
charge retention capacity drops from 6-months to about 5 days.
So, every 2 years I have to purchase 8 new batteries (4 primary, and 4
backup), at a total cost of roughly $200.
The reason that I point this out, is because today NiMH technology is
being discussed as having a potential for electric car applications,
silly as that thought might be.
Why is it silly. It's silly becasue a NiMH battery with sufficient
power to operate a practical automobile would carry a price tag that
would be roughly half the price of the car, and when its performance
significantly deteriorated in about 1 year, most owners would likely
opt to replace the car, rather than simply the battery.
Now when you add the cost of electricity to charge up the battery on a
at least a daily basis to the amortization of the cost of the battery/
car over 1 year, the total becomes somewhat astronomical, making $4.00/
gallon gasoline seem like a bargain.
Ah, but you say it would be worth it, becasue it's "GREEN". Then too,
you may wish to think that one over just a small bit since all off
that electricity has to be generated somewhere, and since the "GREEN
FANS" don't generally like nuclear powere (although a grown number of
environmentalists do), we simply would be switching the area of
polution from the point of use to the point of generation. This has
no major advantage, other than to take the air polution from the major
citys and move it to less urban locales...in short accomplishing of
benefit to the overall environments.
Then to, one has to reasonably ask where are all of these depleted/
worn batteries and used cars going to terminate. Here, two possible
solutions exist: First, we could dump in still more energy and
recycle them, or better yet, sell them under the table to the illegal
aliens whose migrations in to the US are ever increasing, up to the
point that the US is reduced to being just another third-class toilet
with no middle-class, exactly like those places from which the illegal
aliens fled!
Just thinking out loud...
Harry C.
.
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