<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">I don't agree John. Write a spec for your batteries. When you get to the user friendly section, state of charge is the most important parameter. How do you determine when it is charged (when to terminate charging) and how do you know when it needs to be charged. Safe fast charging is also a desirable feature. LiXX wins. It is very difficult to determine the state of charge of NiXX batteries. You'd never specify a battery that you need to overcharge to make sure it is charged and that is the case with NiXX. Lithium also wins if you want small batteries. If it is safety that you alluding to, it is important to know what you are doing with any kind of battery. NiCds can deliver a lot of energy in a very short time too.<div><br></div><div>Jim O</div><div><br></div><div><br><div><div>On Apr 17, 2009, at 6:52 AM, John Ferrell wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 18px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div bgcolor="#ffffff"><div><font face="Arial" size="2">I believe the market has confirmed your choice. The availability of NiCads seems to be shrinking. The latest crop of NiMh (Eneloop, Sanyo) looks to me like it will have own the entire market place soon. LiPo's still seem to be the best power/weight ratio for those who need big batteries but remain less user friendly.</font></div><div> </div><div>John Ferrell W8CCW</div><div> </div><div>"All that is necessary for the triumph of evil is for good men to do nothing." -- Edmund Burke<br>...."The problem with socialism is that you eventually run out of other people's money." <span class="Apple-converted-space"> </span><br> MARGARET THATCHER<span class="Apple-converted-space"> </span><br><a href="http://DixieNC.US">http://DixieNC.US</a></div><div> </div><div> </div><blockquote style="padding-right: 0px; padding-left: 5px; margin-left: 5px; border-left-color: rgb(0, 0, 0); border-left-width: 2px; border-left-style: solid; margin-right: 0px; "><div style="font: normal normal normal 10pt/normal arial; ">----- Original Message -----</div><div style="background-image: initial; background-repeat: initial; background-attachment: initial; -webkit-background-clip: initial; -webkit-background-origin: initial; background-color: rgb(228, 228, 228); font: normal normal normal 10pt/normal arial; background-position: initial initial; "><b>From:</b><span class="Apple-converted-space"> </span><a title="geobet4@verizon.net" href="mailto:geobet4@verizon.net">George W.Kennie</a></div><div style="font: normal normal normal 10pt/normal arial; "><b>To:</b><span class="Apple-converted-space"> </span><a title="nsrca-discussion@lists.nsrca.org" href="mailto:nsrca-discussion@lists.nsrca.org">NSRCA Mailing List</a></div><div style="font: normal normal normal 10pt/normal arial; "><b>Sent:</b><span class="Apple-converted-space"> </span>Thursday, April 16, 2009 3:12 PM</div><div style="font: normal normal normal 10pt/normal arial; "><b>Subject:</b><span class="Apple-converted-space"> </span>[NSRCA-discussion] batteries?</div><div><br></div><div><font face="Arial" size="4">TOO COTTON-PICKIN' QUIET on here so I thought I'd stir the waters a little.</font></div><div><font face="Arial" size="4"></font> </div><div><font face="Arial" size="4">I remember, several times hearing on this forum that Nickel Metal Hydride batteries were not all that desirable of a choice</font></div><div><font face="Arial" size="4">when making the decision to make up a pak due to their tendency to self-discharge and other erratic anomolies.</font></div><div><font face="Arial" size="4"></font> </div><div><font face="Arial" size="4">I feel compelled to relate my experience. I put a set of 2500 ma cells in my Txmitter a little over a year ago.</font></div><div><font face="Arial" size="4"></font> </div><div><font face="Arial" size="4">When I take this unit off of charge, many times it has indicated a voltage of 12 Volts (usually 11.9). My previous charge</font></div><div><font face="Arial" size="4">was done last September and even though we are located in the N.E. where we sometimes fly in temps ranging into</font></div><div><font face="Arial" size="4">the low 20's, we do get out quite a few weekends throughout the winter. Despite the fact that I never take my Txmitter</font></div><div><font face="Arial" size="4">out of the car all winter long and it's subjected to 5 degree nites, which I'm told is not good for batteries, I charged it</font></div><div><font face="Arial" size="4">about a week and a half ago and since September it had finally dropped to 10.5 Volts.</font></div><div><font face="Arial" size="4"></font> </div><div><font face="Arial" size="4">Special Paks?, you ask? I go to Best Buy and pick 'em up and solder up my own. They're not significantly cheaper</font></div><div><font face="Arial" size="4">than commercially available stuff I could buy, but when the impulse strikes, I conveniently go and get 'em. Nice !</font></div><div><font face="Arial" size="4"></font> </div><div><font face="Arial" size="4">Since a week and a half ago I've only flown about 3 times, but the thing is still reading 11.5 !</font></div><div><font face="Arial" size="4"></font> </div><div><font face="Arial" size="4">Now I do have to admit that they like a slow charge better than fast, but I never slow charge the flight paks I wire up</font></div><div><font face="Arial" size="4">for my planes and I don't own any planes with commercial flight paks and some of them have more years on them than</font></div><div><font face="Arial" size="4">I would dare to mention in this group.</font></div><div><font face="Arial" size="4"></font> </div><div><font face="Arial" size="4">Soooo, If you've been considering a NMH pak and you have doubts or concerns, take my experience for what it's worth !?!</font></div><div><font face="Arial" size="4"></font> </div><div><font face="Arial" size="4">G.</font></div><br><hr>I am using the Free version of<span class="Apple-converted-space"> </span><a href="http://www.spamfighter.com/len">SPAMfighter</a>.<br>We are a community of 6 million users fighting spam.<br>SPAMfighter has removed 25181 of my spam emails to date.<br>The Professional version does not have this message.<br><div><br class="webkit-block-placeholder"></div><hr><div><br class="webkit-block-placeholder"></div>_______________________________________________<br>NSRCA-discussion mailing list<br><a href="mailto:NSRCA-discussion@lists.nsrca.org">NSRCA-discussion@lists.nsrca.org</a><br><a href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion">http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</a></blockquote>_______________________________________________<br>NSRCA-discussion mailing list<br><a href="mailto:NSRCA-discussion@lists.nsrca.org">NSRCA-discussion@lists.nsrca.org</a><br><a href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion">http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</a></div></span></blockquote></div><br></div></body></html>