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<DIV><FONT face=Arial size=2>Ed:</FONT></DIV>
<DIV><FONT face=Arial size=2>Yep, 1/10C would be 220 mA for your 2200 mAh
pack. To condition a NiMh pack when brand new, you do several conditioning
charges at 1/10C. You want to go a full 24 hours at 1/10C, do a discharge
to complete a cycle and repeat for a total of 3 or 4 full cycles. This
will generally get you to full capacity and also gets the cells ready to
accept higher rate charging and with the right charger, they will then start to
give a reliable indication of when they have peaked. After these first
conditioning charges, you do not want to exceed about 16 hrs at 1/10C, though at
1/10C it's a low enough rate that you're not going to damage it if you do
go over. Anything higher than 1/10C can shorten the life of the cells if
repeated overcharging is done. The higher the rate and the more time it is
overcharged, the faster the degradation can occur.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Ed</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<BLOCKQUOTE
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=divesplat@yahoo.com href="mailto:divesplat@yahoo.com">Ed Deaver</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> Monday, February 27, 2006 12:57
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion] NiMH
follow up</DIV>
<DIV><BR></DIV>
<DIV>OK, for us non-electical whiz bang guys, please explain the C
charge. I have heard it before and tried what was suggested on RCU
without success.</DIV>
<DIV> </DIV>
<DIV>My new NmHD pack is a 2200mah, 4 cell pack. To condiditon it
properly for first flights what should I do? </DIV>
<DIV> </DIV>
<DIV>Does 1/10 C mean charge at 220 mah for 16 hrs??</DIV>
<DIV> </DIV>
<DIV>THanx for the explanation.</DIV>
<DIV> </DIV>
<DIV>ed<BR><BR><B><I>Michael Cohen <precisionaero@comcast.net></I></B>
wrote:</DIV>
<BLOCKQUOTE class=replbq
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">Thanks
to those who helped me with the advice. The 1/10 C change was the
<BR>answer. Both packs are happily at 1610-1690 capacity for their 1650
rating. <BR>I also visited an old friend's website, Electrodynamics in
Michigan. They <BR>had an interesting write up on their website about NiCD
(with a little NiMH <BR>sprinkled in! ). I used to buy all my switches,
extensions, and battery packs <BR>from them when I lived in the Great White
North. Their advice was 1/10 C <BR>also, but they had lots of other good
info there as well. I recommend you <BR>take a look, unless your one of
those Lithium people.<BR><BR>Mike Cohen
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