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Hi John,
<BR>Thanks for the kind words, but I have the same struggles grasping some
of this stuff as anybody else (probably quite a bit more). Take this battery
stuff. I can't understand why it is that if I take my 500 ma pak and connect
it to my 50 ma wall charger for 10 hours it isn't fully charged?????
Why is it necessary to charge it for 16 hours and try to stuff 800 ma into
that little package (hmmm,......maybe that's why those lipos swell up that
way??? BG ). I'm aware that when I fast charge my Tx pak, if I can get
it off the charger about 3-5 minutes before that buggar reaches peak, the
voltage will read 12 volts, but if I leave it on past peak the voltage
will be depressed to 11.4 or even 11.2. So why the heck would we want to
charge for 16 hours when the max voltage probably occurs somewhere around
10 hours?????????(I'm guessing).
<BR>You and Ed have a really good handle on this stuff, but I don't !!!!
<BR>Georgie
<BR>
<P>John Pavlick wrote:
<BLOCKQUOTE TYPE=CITE> <SPAN
class=070420601-28022006><FONT FACE="Arial"><FONT COLOR="#0000FF"><FONT SIZE=-1>Jay,</FONT></FONT></FONT></SPAN><SPAN
class=070420601-28022006><FONT FACE="Arial"><FONT COLOR="#0000FF"><FONT SIZE=-1>
Yeah, I guess I forgot to point that out. The time applies to a fully discharged
pack (.9 ~ 1V per cell). At C/10 it's pretty hard to hurt anything
by "overcharging" i.e. charge a partially discharged pack for 16 hours.
At the higher rates it becomes a very real possibility. Normally for "Fast"
charging you'd use a good Peak detect charger: 0 delta V or negative
delta V depending on the cell chemistry. For C/10 you can get away with
a low cost constant current charger - but you do need to shut it off! Ed
also pointed out that new packs generally need a full 20 hours on the charger
at C/10. I would agree that this is a good thing to do, but do remember
to stop charging them at 20 hours. It's easy to forget. Better yet use
a timer, but if you go this route, make sure that the charger won't turn
into a "discharger" when the input power is removed.</FONT></FONT></FONT></SPAN><SPAN class=070420601-28022006>
<P><FONT FACE="Arial"><FONT COLOR="#0000FF"><FONT SIZE=-1>John Pavlick</FONT></FONT></FONT>
<BR><FONT FACE="Arial"><FONT COLOR="#0000FF"><FONT SIZE=-1><A HREF="http://www.idseng.com/" target="_blank">http://www.idseng.com</SPAN><SPAN class=070420601-28022006></A> </FONT></FONT></FONT></SPAN>
<BLOCKQUOTE
style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">
<DIV class="OutlookMessageHeader" dir="ltr"><FONT FACE="Tahoma"><FONT SIZE=-1>-----Original
Message-----</FONT></FONT>
<BR><FONT FACE="Tahoma"><FONT SIZE=-1><B>From:</B> nsrca-discussion-bounces@lists.nsrca.org
[<A HREF="mailto:nsrca-discussion-bounces@lists.nsrca.org">mailto:nsrca-discussion-bounces@lists.nsrca.org</A>]<B>On Behalf Of </B>Jay
Marshall</FONT></FONT>
<BR><FONT FACE="Tahoma"><FONT SIZE=-1><B>Sent:</B> Tuesday, February 28,
2006 4:23 PM</FONT></FONT>
<BR><FONT FACE="Tahoma"><FONT SIZE=-1><B>To:</B> NSRCA Mailing List</FONT></FONT>
<BR><FONT FACE="Tahoma"><FONT SIZE=-1><B>Subject:</B> Re: [NSRCA-discussion]
NiMH follow up</FONT></FONT></DIV>
<SPAN class=156521521-28022006><FONT FACE="Arial"><FONT COLOR="#0000FF"><FONT SIZE=-1>You
are correct on the rate. The time is dependatn upon how much of the original
charge remains. A good charger will charge only as long as necessary to
meet its full chare specification (voltage, etc.).</FONT></FONT></FONT></SPAN></BLOCKQUOTE>
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