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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-family:"Comic Sans MS";color:windowtext'>Yes, warm to at least 50deg F before charging. Was charging at the field last winter and the Powerlab6 was stopping charge at 90% of capacity. Thought the charger was broken. Turns out they use the internal temp sensor to check ambient as well and if below 50F, it will stop at 90% to keep from damaging the battery (with the assumption that battery is also <50F). The Powerlabs allow lowering that threshold to 41F, once I did that started getting full charges (but made sure the batteries stayed warm before charge via thermo-nuclear fusion (truck dashboard). <o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Comic Sans MS";color:windowtext'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Comic Sans MS";color:windowtext'>From FMA Revolectrix engineering group: </span><span style='font-family:"Calibri","sans-serif";background:#F2F4F5'>Lithium is a poor performing battery in cold weather. If the pack is cold, the cell damage voltage reduces from 4.35V down to 4.20V. That means charging a lithium pack to 100% when it is below 50 deg F will reduce cycle life.</span><span style='font-family:"Calibri","sans-serif"'> Automatic temperature monitoring prevents pack over-charging at low ambient temperatures</span><span style='font-family:"Calibri","sans-serif";color:windowtext'><o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Comic Sans MS";color:windowtext'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Comic Sans MS";color:windowtext'>They also say: </span><span style='font-size:10.0pt'>LiPo packs charged to 100% should not be cooled below room temperature. Cells at 90% or less capacity can be cooled below 32ºF (0ºC). </span><span style='font-family:"Comic Sans MS";color:windowtext'><o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Comic Sans MS";color:windowtext'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'> NSRCA-discussion [mailto:nsrca-discussion-bounces@lists.nsrca.org] <b>On Behalf Of </b>Stuart Chale via NSRCA-discussion<br><b>Sent:</b> Saturday, October 10, 2015 9:01 AM<br><b>To:</b> chuenkan@comcast.net; General pattern discussion<br><b>Subject:</b> Re: [NSRCA-discussion] LiPo Fun Fact 'O The Day<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'>What about if you store them in the fridge during the week. Should they warm to room temp before charging or is charging them cold OK?<o:p></o:p></p><div><p class=MsoNormal>On 10/10/2015 10:08 AM, Phil Spelt via NSRCA-discussion wrote:<o:p></o:p></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><div><p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>Correct!!! I don't do that...<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p></div><div class=MsoNormal align=center style='text-align:center'><span style='font-family:"Arial","sans-serif"'><hr size=3 width="100%" align=center id=zwchr></span></div><div><div><p class=MsoNormal><span style='font-family:"Helvetica","sans-serif";background:#FFFF99'>Apparently you guys never put them on charge when they're hot</span><span style='font-family:"Helvetica","sans-serif"'>!! Then they definitely cool down while charging. :)<br><br>Sent from my average intelligence phone <o:p></o:p></span></p><div><p class=MsoNormal><span style='font-family:"Helvetica","sans-serif"'><o:p> </o:p></span></p></div></div><div><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-family:"Helvetica","sans-serif"'><br>On Oct 9, 2015, at 8:44 PM, Robert L. Beaubien via NSRCA-discussion <<a href="mailto:nsrca-discussion@lists.nsrca.org" target="_blank">nsrca-discussion@lists.nsrca.org</a>> wrote:<o:p></o:p></span></p></div><p class=MsoNormal><span style='font-family:"Helvetica","sans-serif"'><br>_______________________________________________<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><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p></div></div><p class=MsoNormal><br><br><br><o:p></o:p></p><pre>_______________________________________________<o:p></o:p></pre><pre>NSRCA-discussion mailing list<o:p></o:p></pre><pre><a href="mailto:NSRCA-discussion@lists.nsrca.org">NSRCA-discussion@lists.nsrca.org</a><o:p></o:p></pre><pre><a href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion">http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</a><o:p></o:p></pre></blockquote><p class=MsoNormal><o:p> </o:p></p></div></body></html>