Li-Ion packs

[Rcmaster199 at aol.com]

In a message dated 9/8/2002 8:58:57 PM Eastern Daylight Time, Rcmaster199 
writes:


> Subj:Re: Li-Ion packs 
> Date:9/8/2002 8:58:57 PM Eastern Daylight Time
> From:<A HREF="mailto:Rcmaster199">Rcmaster199</A>
> To:<A HREF="mailto:discussion at nsrca.org">discussion at nsrca.org</A>
> 
> 
> 
> In a message dated 9/6/2002 3:00:54 PM Eastern Daylight Time, 
> jbudd at QNET.COM writes:
> 
> 
> >> Subj:RE: Li-Ion packs 
>> Date:9/6/2002 3:00:54 PM Eastern Daylight Time
>> From:<A HREF="mailto:jbudd at QNET.COM">jbudd at QNET.COM</A>
>> Reply-to:<A HREF="mailto:discussion at nsrca.org">discussion at nsrca.org</A>
>> To:<A HREF="mailto:discussion at nsrca.org">discussion at nsrca.org</A>
>> Sent from the Internet 
>> 
>> 
>> 
>> >Thanks Jim.
>> >
>> >Ive been curious what a discharge curve looks like for
>> >these batteries, anyone seen one?
>> 
>> My experience is that it's pretty constant (but not level), similar 
>> to a lead-acid battery (which makes it very predictable).  As far as 
>> I can tell (and I've run my Li-ion packs from Bern Furgang at 
>> http://www.superbatterypacks.com down to slightly less than 6.6v) it 
>> stays pretty linear with no discernable change in slope.
>> 
>> I eMailed Bern about this and he replied with, "I would not go below 
>> the 6V threshold as you could loose the pack.  7.2V is a very safe 
>> low end.  If you are at 6.6V you are OK."
>> 
>> Before I purchased the Li-ion pack/charger I consulted with Jim 
>> Oddino as he had some experience with them.  He indicated that he was 
>> favorably impressed.  I purchased the bx & charger in late June, and 
>> at this point, I am too.
>> 
>> Jerry
>> 
>> -- 
>> ___________
>> Jerry Budd
>> mailto:jbudd at qnet.com
> 
> 
> At our club contest this weekend, I heard some very disturbing news 
> regarding one manufacturer's present design Li-ion batteries. According to 
> the source, the internal charge/voltage regulation circuitry, fails by 
> shorting out. The ensuing heat from the short has caused a fire and some 
> lost equipment. 
> 
> I would advise extreme caution with SOME of these battery systems. 
> 
> Matt Kebabjian
> D3 VP

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