Charging concerns/questions with NMP Lithium Ion batteries

[cameron]

Jim,
 Your correct about the learning curve! I have spoken with a few
HARDCORE electric guys & they really do heed those AMA guidelines cause
they have seen some rapid type failures!  I charge my laptop over night
& Toshiba has not ,Nor has the Computer industry notified me to charge
it in a fireproof vault/grill! 
  It's easy to see other issues with Li-ion  on the internet!  
  It's a shame we have companies out there that do there R&D in such a
manner,  I feel comfortable with my SPECIFIC USE Li-Ion batteries in
CERTAIN applications,
 But just don't trust everybody to assemble packs of Chinese cells and
put them in my house anymore!
 
 And your assumption that "It has been corrected". trust me from where I
sit IT HAS NOT!  At least the price of being there R&D testing Guinea
pigs!
 
 Sometimes you just never know when YOUR gonna be the TESTING DUMMIE!
And the curve will be drawn Around YOU!
 
                                                  Ni-cads working good
for me! @ c/10
 -----Original Message-----
From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]
On Behalf Of JOddino
Sent: Monday, May 10, 2004 12:34 PM
To: discussion at nsrca.org
Subject: Re: Charging concerns/questions with NMP Lithium Ion batteries



I'm guessing that you don't really know if there is a bigger problem in
the R/C industry vs. other applications.  There hasn't been in my neck
of the woods.  There will be when we start powering our models with
them, but I don't believe operating our R/C systems with Li-Ion poses a
high risk.  
I do believe that the company that has given Lithiums a bad reputation
is the one that added the charge circuitry in the packs and it was the
implementation (not the concept) of that circuitry that caused the
problems.  I assume it has been corrected.  I also believe that it takes
some level of learning to avoid accidents but that is not unusual for
modelers.  There are many dangers in our hobby.  So If someone doesn't
feel up to the learning process, stick with what you know.
Jim  

----- Original Message ----- 
From: Rcmaster199 at aol.com 
To: discussion at nsrca.org 
Sent: Sunday, May 09, 2004 7:37 PM
Subject: Re: Charging concerns/questions with NMP Lithium Ion batteries

I have tried to stay out of most of this discussion but something is
gnawing at me. I have asked this question before, but don't believe I
have gotten an answer. Maybe no one on the list knows 

Since Li-ion and Li-poly technology is widely used in cameras and cell
phones, and these are recharged all  the time (in the home and without
special power supplies like separate 12 volt sources and such) with
extremely safe circuitry, why is it that the folks who offer these same
battery types to us, use charging circuitry that isn't so bullet
proof???

Certainly currents and voltages are different in some applications, but
the chemistry is the same. And Lithium metal will burn with ferocious
intensity whether 20 grams are exposed or 10 times that amount. The heat
is enough to burn your plane or house either way.

Matt K


Subj:Re: Charging concerns/questions with NMP Lithium Ion batteries 
Date:5/9/2004 12:33:04 PM Eastern Daylight Time
From:kerlock at comcast.net
Reply-to:discussion at nsrca.org
To:discussion at nsrca.org
Sent from the Internet 



First off, I'm not looking for compassion. That was a simple explanation
as
to why a guy who is normally cheery, laughing and all smiles could go
into a
practically homicidal rage over a smart a* comment

Secondly and most importantly, I'd like you to explain to me, with as
much
detail as you'd like, how my position is extreme in any way, shape or
form.
To me, an extreme position would be "ban lithium batteries". I have
never
said or proposed any such thing. I'd like to know how recommending
caution
and informing the uninformed could POSSIBLY be viewed as extreme. Or is
anyone even bothering to read, or are they just glancing and knee
jerking?

And I don't need any type of apology, but thanks for the thought. I mean
it.

-Mike

----- Original Message ----- 
From: "John Ferrell" <johnferrell at earthlink.net>
To: <discussion at nsrca.org>
Sent: Sunday, May 09, 2004 10:12 AM
Subject: Re: Charging concerns/questions with NMP Lithium Ion batteries


> We can always start over. I am sometimes guilty of "picking on"
someone
> because their reaction is extreme. I see now that I should investigate
> conditions further to assure that what I intend as good natured joking
is
> not taken as insensitive and cruel. Fortunately, it was not I that was
the
> perpetrator this time, but it could have been.




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