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Dell's first attempt to market perpetual motion

  • Thread starter The Flavored Coffee Guy
  • Start date
lithium cells have worried me from day one

of course trying to make a clever post without being clever i knew
someone would post about the flaming dells but not in such a odd way

well it worked we all fell for the troll

who is more supid? the troll or the first to respond to the troll? or
the first person to comment on the troll responder?
 
B

Bill Ghrist

Jan 1, 1970
0
lithium cells have worried me from day one

of course trying to make a clever post without being clever i knew
someone would post about the flaming dells but not in such a odd way

well it worked we all fell for the troll

who is more supid? the troll or the first to respond to the troll? or
the first person to comment on the troll responder?
From The Register http://www.theregister.com/2006/08/18/letters_1708/

Laptops roasting it's an open fire
Acrid fumes assail your nose
Melting chips smell like burning tires and
Techs dressed in asbestos clothes

Everybody knows short circuits in a battery
Help to make the office bright
End users with their cubes all aglow
Will find it hard to work tonight

They know a recall's on its way
Before the desk is charcoaled in a blaze
And every engineer is gonna spy
To see if laptops really know how to fry

And so I'm remembering this simple phrase
like geeks from one to ninety two
Although we dread it many times many ways
Yeah, we're getting a Dell, Dude!

Grant
 
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The Flavored Coffee Guy

Jan 1, 1970
0
Please, be serious...

Any lithium battery will explode if defective or improperly charged. No
magic there, no thermodynamics law violation.

It's a violation of the laws of thermodynamics as soon as something
that it's made of melts and it's not supposed to, or something burns
when it's not supposed to, even though they built that way.
 
T

The Flavored Coffee Guy

Jan 1, 1970
0
lsmartino said:
The Flavored Coffee Guy ha escrito:


Please, be serious...

Any lithium battery will explode if defective or improperly charged. No
magic there, no thermodynamics law violation.

Then putting new batteries in the computer won't do any good, will it?
If it's the charger, it built into the computer, not the battery.
 
B

Bob Myers

Jan 1, 1970
0
The Flavored Coffee Guy said:
It's a violation of the laws of thermodynamics as soon as something
that it's made of melts and it's not supposed to, or something burns
when it's not supposed to, even though they built that way.

HOW, pray tell? Please try to follow with me on the following
brief chain of reasoning.

1. Plastics typically will melt if you get them hot enough.

2. A laptop battery, when charged, contains quite a considerable
amount of energy.

3. If you let that energy out in a rapid, uncontrolled fashion, it's
not unreasonable to think that things in the immediate vicinity
are going to get hot.

4. Given the above, we might expect to see any plastics in
the vicinity - including, say, those that formed the case of the
battery in question - melting.

OK, at what point in the above did we violate the laws of
thermogoddamics?

Bob M.
 
B

Bob Myers

Jan 1, 1970
0
The Flavored Coffee Guy said:
Then putting new batteries in the computer won't do any good, will it?
If it's the charger, it built into the computer, not the battery.

If you make the assumption that it IS a flaw external to the battery
which caused the problem in this particuar case, you'd be right.
On what grounds are you assuming this?

(Hint: the statement "any lithium battery will explode if defective or
improperly charged" does not equate to "the only thing that can
cause the failure of a lithium battery is a bad charger." You DO
see that little word "defective" in the above, which refers to the
battery itself, right?)

Bob M.
 
E

Eeyore

Jan 1, 1970
0
The said:
It's a violation of the laws of thermodynamics as soon as something
that it's made of melts and it's not supposed to, or something burns
when it's not supposed to, even though they built that way.

Don't be absurd !

Graham
 
E

Eeyore

Jan 1, 1970
0
The said:
Then putting new batteries in the computer won't do any good, will it?
If it's the charger, it built into the computer, not the battery.

Most laptop batteries contain the charging circuitry. This is essential since it
needs to monitor the battery temperature and *terrminal* voltage precisely in
order to charge it quickly and safely.

The ac power unit is just that, not a 'charger' at all.

So, replacing the 'battery' does indeed fix the problem.

Graham
 
L

lsmartino

Jan 1, 1970
0
The Flavored Coffee Guy ha escrito:
It's a violation of the laws of thermodynamics as soon as something
that it's made of melts and it's not supposed to, or something burns
when it's not supposed to, even though they built that way.


I´m sure you will not understand this link, but anyway here it goes
for the benefit of other readers:

http://www.powerstream.com/li.htm
 
M

Matthew Beasley

Jan 1, 1970
0
The Flavored Coffee Guy said:
Then putting new batteries in the computer won't do any good, will it?
If it's the charger, it built into the computer, not the battery.

Li packs have electronics on board that dictate charge termination (Li
batteries are not "floated").
Changing the battery out will introduce new charge termination electronics.
 
J

James Sweet

Jan 1, 1970
0
Bob said:
If you make the assumption that it IS a flaw external to the battery
which caused the problem in this particuar case, you'd be right.
On what grounds are you assuming this?

(Hint: the statement "any lithium battery will explode if defective or
improperly charged" does not equate to "the only thing that can
cause the failure of a lithium battery is a bad charger." You DO
see that little word "defective" in the above, which refers to the
battery itself, right?)

Bob M.


These batteries are "intelligent", they have onboard management which is
used to control the charging circuit.
 
B

Bob Myers

Jan 1, 1970
0
These batteries are "intelligent", they have onboard management which is
used to control the charging circuit.

And that affects what I'd said how, exactly?

Bob M.
 
E

Eeyore

Jan 1, 1970
0
Bob said:
And that affects what I'd said how, exactly?

What's he's saying is the battery contains it own charging circuitry inside. If
you change the battery, you're also changing the charger at the same time.

Graham
 
E

Eeyore

Jan 1, 1970
0
Bob said:
Yes, thank you, that's precisely how I interpreted it, too.
The question above still stands, though.

A recall would presumably be replacing 'dodgy' units I suppose.

Graham
 
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