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<DIV><FONT face=Arial size=2>The charger is a very important part of the system.
One thing to take note of in Troy's message is the charger has an Ammeter.
The meter tells you a lot about the state of charge and the charging
process. You will get to know that after so many flights the charger will
start at so many amps. You will know that after x minutes the current
should drop to y amps. If it is doing this you can walk away with a
reasonable knowledge that everything is working like it should. When you
come back and the current is down to less than 50 mA you can be assured it is
charged. </FONT></DIV>
<DIV><FONT face=Arial size=2>Of course the very expensive chargers with digital
readouts will give you the same info and more will allow the same level of
confidence that the charge process is going well.</FONT></DIV>
<DIV><FONT face=Arial size=2>For example if you used the 3 cell transmitter
charger on your 2 cell airborne pack you wouldn't see the current start to fall
and you would know something was wrong and you wouldn't walk away without fixing
it.</FONT></DIV>
<DIV><FONT face=Arial size=2>I'm hearing about more and more horror stories and
so far I think the chargers have been the culprit. Anyone got any better
info?</FONT></DIV>
<DIV><FONT face=Arial size=2>Jim</FONT></DIV></DIV>
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style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=Eric.Henderson@gartner.com
href="mailto:Eric.Henderson@gartner.com">Henderson,Eric</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=discussion@nsrca.org
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Thursday, September 04, 2003 1:15
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> RE: Lithium or Not ?</DIV>
<DIV><BR></DIV>
<DIV><SPAN class=466301020-04092003><FONT face=Arial color=#0000ff size=2>I
would add that we get focussed on the battery and not the charger. All
batteries will do something nasty if seriously
overcharged.</FONT></SPAN></DIV>
<DIV><SPAN class=466301020-04092003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=466301020-04092003><FONT face=Arial color=#0000ff size=2>I
pay a lot of attention to what Jim O. tells me. If the charger will not
prevent an overcharge then you have high risk situation. Jim has written
about this before.</FONT></SPAN></DIV>
<DIV><SPAN class=466301020-04092003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=466301020-04092003><FONT face=Arial color=#0000ff
size=2>Regards,</FONT></SPAN></DIV>
<DIV><SPAN class=466301020-04092003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=466301020-04092003><FONT face=Arial color=#0000ff
size=2>Eric.</FONT></SPAN></DIV>
<DIV><SPAN class=466301020-04092003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=466301020-04092003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> discussion-request@nsrca.org
[mailto:discussion-request@nsrca.org]<B>On Behalf Of </B>Troy
Newman<BR><B>Sent:</B> Sunday, August 31, 2003 6:49 PM<BR><B>To:</B>
discussion@nsrca.org<BR><B>Subject:</B> Re: Lithium or Not
?<BR><BR></FONT></DIV>
<DIV><FONT face=Arial size=2>Li-ion packs.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Bob, and Lance.....</FONT></DIV>
<DIV><FONT face=Arial size=2>I have been running these 2000mah packs since
February. They are a 2 cell pack. Central sells them for $35 a pack and they
have a $50 charger....Here is the kicker. The charger is plug in and forget.
It can't harm the batteries even if left on charge for 3 months. Its basically
a voltage regulator setup where it puts out 8.4V and when the pack reaches
8.4V its done....The nice thing is the charger has a Amp meter on it so when
the battery is empty it might take 1-1.3amps but as it charges the current
flow goes to zero. Once the pack is charged up the current flow is zero and no
juice is going to the battery. You're not waiting for a light to turn color or
go out...You can see what is actually going into the battery.</FONT></DIV>
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