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<DIV> Cutoff voltage should be at .9 to check capacity, Triton instruction say 1.1 for useful flight time.</DIV>
<DIV> Steve Maxwell</DIV>
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<DIV style="FONT: 10pt Arial">----- Original Message ----- </DIV>
<DIV style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B> <A title=precisionaero@comcast.net href="mailto:precisionaero@comcast.net">Michael Cohen</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To: </B><A title=nsrca-discussion@lists.nsrca.org href="mailto:nsrca-discussion@lists.nsrca.org">NSRCA Mailing List</A></DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> 2/23/2006 9:48:24 PM </DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [NSRCA-discussion] NiMH Question</DIV>
<DIV><BR></DIV><FONT size=2>
<DIV><FONT face=Arial size=2>I am cycling my batteries and getting ready for the flying season. On my initial 5 cycle run at my NiMH batteries, both my 1650 mAh packs cycled very low. One pack that I have not used since end of November only cycled up to 850 mAh and the other pack I have not used since end of September only cycled up to 1000 mAh. My charger is set to 5 cycles, charge and discharge are set to .65 amps with a cutoff voltage at 1.1 Volts per cell. I am now trying 1.00 amp charge/discharge with a 1.0 volt per cell cutoff and it is looking better, but I have some questions:</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>1) Did I damage the batteries by letting them self-discharge too low? I know NiMH batteries have a higher self discharge rate than NiCD batteries, but I am not aware letting the NiMH batteries run down could cause damage.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>2) Is this a normal behavior? Maybe NiMH just need a little more juice at the beginning of the season.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>3) Is the cold garage a factor?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Thoughts?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Mike Cohen</FONT></DIV></FONT></BLOCKQUOTE></BODY></HTML>