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<DIV dir=ltr align=left><SPAN class=500032901-30032006><FONT face=Arial
color=#0000ff size=2>Isn't "a123" the batteries that Sony is currently
using in their MP3 players?</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=500032901-30032006></SPAN> </DIV><SPAN
class=500032901-30032006></SPAN><FONT face=Arial><FONT color=#0000ff><FONT
size=2>Ihncheol Park<SPAN
class=500032901-30032006></SPAN></FONT></FONT></FONT><BR>
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<FONT face=Tahoma size=2><B>From:</B> nsrca-discussion-bounces@lists.nsrca.org
[mailto:nsrca-discussion-bounces@lists.nsrca.org] <B>On Behalf Of </B>brett
terry<BR><B>Sent:</B> Wednesday, March 29, 2006 6:38 AM<BR><B>To:</B> NSRCA
Mailing List<BR><B>Subject:</B> Re: [NSRCA-discussion] Interesting Battery
stuff<BR></FONT><BR></DIV>
<DIV></DIV>I had a long response ready, until a server crash dumped my
message.<BR><BR>There is a long thread about these cells in the electric
helicopter forum on RCGroups. They exhibit a greater voltage depression
under load than LiPo cells, but they seem to have great success pulling 50+ amps
continually with bursts of 100A. The cells they are using come from the
Milwaukee 28V drill, weigh 100 grams each, and are 3000 mAh capacity. Best
of all, a 7-cell pack (28V) costs around $100. <BR><BR>Both manufacturers (a123
systems and eMoli) refuse to sell directly to RC guys, but stripping the cells
from the Milwaukee battery pack seems easy
enough.<BR><BR>Pros:<BR>cheap!<BR>reliable<BR>readily available<BR>durable
construction<BR><BR>Cons:<BR>somewhat heavy for their capacity compared to
LiPo<BR>increased voltage depression under load requires running an extra cell
(7S vs. 6S, for example)<BR><BR>There is a thread on RCGroups under the ELectric
Helicopter forum about these cells. Here is the link. Be warned the
post is about 78 pages long now. Page 22 (and several others) has
charts showing voltage with watts and voltage with amps over time. <BR><BR><A
href="http://www.rcgroups.com/forums/showthread.php?t=456011">http://www.rcgroups.com/forums/showthread.php?t=456011</A><BR><BR>
<DIV><SPAN class=gmail_quote>On 3/28/06, <B class=gmail_sendername>Stuart
Chale</B> <<A onclick="return top.js.OpenExtLink(window,event,this)"
href="mailto:schale@optonline.net" target=_blank>schale@optonline.net</A>>
wrote:</SPAN>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; MARGIN: 0pt 0pt 0pt 0.8ex; BORDER-LEFT: rgb(204,204,204) 1px solid">
<DIV style="DIRECTION: ltr">
<DIV>
<P><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><A
onclick="return top.js.OpenExtLink(window,event,this)"
href="http://www.a123systems.com/html/tech/power.html"
target=_blank>http://www.a123systems.com/html/tech/power.html</A></SPAN></FONT></P>
<P><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Above is their
technology page. 35C discharge. 5 minute charge.
</SPAN></FONT></P>
<P><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"></SPAN></FONT> </P>
<P><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Anyone with good
battery knowledge take a look at this? Is this the no worry cells that
will convince everyone to go electric </SPAN></FONT><FONT face=Wingdings
color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Wingdings">J</SPAN></FONT><FONT
face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"> </SPAN></FONT></P>
<P><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"></SPAN></FONT> </P>
<P><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">If only they live up
to their advertising </SPAN></FONT><FONT face=Wingdings color=navy
size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Wingdings">J</SPAN></FONT><FONT
face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"></SPAN></FONT></P>
<P><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"></SPAN></FONT> </P>
<P><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Stuart</SPAN></FONT></P>
<P><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"></SPAN></FONT> </P>
<DIV>
<DIV style="TEXT-ALIGN: center" align=center><FONT face="Times New Roman"
size=3><SPAN style="FONT-SIZE: 12pt">
<HR align=center width="100%" SIZE=2>
</SPAN></FONT></DIV>
<P><B><FONT face=Tahoma size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">From:</SPAN></FONT></B><FONT
face=Tahoma size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma"> <A
onclick="return top.js.OpenExtLink(window,event,this)"
href="mailto:nsrca-discussion-bounces@lists.nsrca.org"
target=_blank>nsrca-discussion-bounces@lists.nsrca.org</A> [mailto:<A
onclick="return top.js.OpenExtLink(window,event,this)"
href="mailto:nsrca-discussion-bounces@lists.nsrca.org"
target=_blank>nsrca-discussion-bounces@lists.nsrca.org</A>] <B><SPAN
style="FONT-WEIGHT: bold">On Behalf Of </SPAN></B>Cameron Smith<BR><B><SPAN
style="FONT-WEIGHT: bold">Sent:</SPAN></B> Tuesday, March 28, 2006 8:56
AM<BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> Discussion<BR><B><SPAN
style="FONT-WEIGHT: bold">Subject:</SPAN></B> [NSRCA-discussion] Interesting
Battery stuff</SPAN></FONT></P></DIV></DIV>
<DIV style="DIRECTION: ltr"><SPAN>
<P><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P>
<P><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><A
onclick="return top.js.OpenExtLink(window,event,this)"
href="http://www.a123systems.com/html/technology.html"
target=_blank>http://www.a123systems.com/html/technology.html#
</A></SPAN></FONT></P>
<P><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"></SPAN></FONT> </P>
<P><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><A
onclick="return top.js.OpenExtLink(window,event,this)"
href="http://www.technologyreview.com/BizTech-R&D/wtr_16624,295,p1.html"
target=_blank>http://www.technologyreview.com/BizTech-R&D/wtr_16624,295,p1.html</A></SPAN></FONT></P>
<P><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"></SPAN></FONT> </P>
<P><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><A
onclick="return top.js.OpenExtLink(window,event,this)"
href="http://store.yahoo.com/poe512000/ma18vlxtlico.html"
target=_blank>http://store.yahoo.com/poe512000/ma18vlxtlico.html
</A></SPAN></FONT></P>
<P><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">45-minute
Optimum Charger and battery communicates throughout the charging process using
the built-in chip in the battery and built-in CPU chip in the charger. The
Charger also uses "Active 3 Control" for current control, thermal control
& voltage control</SPAN></FONT></P>
<P><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">
</SPAN></FONT></P>
<P><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><A
onclick="return top.js.OpenExtLink(window,event,this)"
href="http://blogs.toolbarn.com/mattg/2006/01/smells-like-dewalt-spirit.html"
target=_blank>http://blogs.toolbarn.com/mattg/2006/01/smells-like-dewalt-spirit.html</A></SPAN></FONT></P>
<P><FONT face="Trebuchet MS" size=3><SPAN style="FONT-SIZE: 12pt">It seems
that their DC9360 battery will use exclusive nano-phosphate lithium-ion cells.
They deliver two to three times the run-time compared with their current 18
volt batteries. D</SPAN></FONT><FONT face="Trebuchet MS" size=2><SPAN
style="FONT-SIZE: 10pt">E</SPAN></FONT><FONT face="Trebuchet MS"><SPAN>WALT is
anticipating 2000 recharge cycles on the battery, which is a significant
increase. The battery is slated to be 2.4 pounds which is roughly the same
weight as their current 18 volt batteries. Otherwise, it will be a slide on
style, instead of the familiar pod currently in use.</SPAN></FONT></P>
<P><FONT face="Trebuchet MS" size=3><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P>
<P><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"></SPAN></FONT> </P>
<P><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"></SPAN></FONT> </P>
<P><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"></SPAN></FONT> </P></SPAN></DIV>
<DIV
style="DIRECTION: ltr"></DIV></DIV><BR>_______________________________________________<BR>NSRCA-discussion
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href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion"
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