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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I’ve never heard of it either, but I suppose that if you fully charged a pack, then heated it up, it might exceed 4.2v for a short while, but that would drop
rather quickly as the pack sits. I wouldn’t think anything like 5v/cell. Mebby 4.3 or so. Just speculation. Nothing I have ever witnessed.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#244061"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#244061">Robert Beaubien<o:p></o:p></span></p>
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<![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#244061"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#244061">D7 Webmaster<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> nsrca-discussion-bounces@lists.nsrca.org [mailto:nsrca-discussion-bounces@lists.nsrca.org]
<b>On Behalf Of </b>Ihncheol<br>
<b>Sent:</b> Thursday, May 16, 2013 10:17 AM<br>
<b>To:</b> Larry Diamond; General pattern discussion<br>
<b>Subject:</b> Re: [NSRCA-discussion] LiPo Storage Voltage Question<o:p></o:p></span></p>
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<p class="MsoNormal">Larry,<o:p></o:p></p>
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<p class="MsoNormal">I've never had a pack that actually had the voltage rising above charged 4.2v per cell.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Is he telling you voltage increases if the pack was stored in lipo charge bag, fully charged?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Not something that I am aware of using lipo for past 9 years.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:9.0pt;color:#575757">Sent from my Samsung Galaxy Note® II<o:p></o:p></span></p>
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-------- Original message --------<br>
From: Larry Diamond <<a href="mailto:ldiamond@diamondrc.com">ldiamond@diamondrc.com</a>>
<br>
Date: 05/16/2013 11:57 AM (GMT-06:00) <br>
To: General pattern discussion <<a href="mailto:nsrca-discussion@lists.nsrca.org">nsrca-discussion@lists.nsrca.org</a>>
<br>
Subject: [NSRCA-discussion] LiPo Storage Voltage Question <br>
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<o:p></o:p></p>
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<p class="MsoNormal" style="background:white"><span style="color:black">A few days ago this was a topic dicussed at length about LiPo charging and storage practice.<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="color:black"> <o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="color:black">I learned a bit and thanks to all the posts sheading light on the topic...<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="color:black"> <o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="color:black">One question that I asked my local battery guy rewarded me with a response I didn't expect. Has anybody else observed this?<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="color:black"> <o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="color:black">Here is his claim/actual observation:<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="color:black"> <o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><em><b><u><span style="color:black">"If a LiPo is stored after a peak charge the voltage may tend to rise over time to as much as 5.0V+ for a single cell."</span></u></b></em><span style="color:black"><o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="color:black"> <o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="color:black">After the discussion topic on here and discussing the issue with my battery guy, I have came to the conclusion that storing a LiPo battery is much safer at a lower voltage state (~3.9V/Cell)
to prevent an inadvertant puff due to an unstable cell(s) climbing voltage over time. I recall the discussion about an unstable pack, but I don't recall any mention of the voltage climbing. Perhaps I missed it and it seems worth revisiting anyway.<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="color:black"> <o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="color:black">Basically any LiPo battery stored over a 2 week period should be charged/discharged to a storage voltage or a nominal 3.9v/cell. Storage voltage opinons vary from 50%+ (~3.9v/cell+)<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="color:black"> <o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="color:black">Internet references show 50% charge = nominal 3.85V/cell)<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="color:black"> <o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="color:black">Additional thoughts on the peaked battery increasing in voltage over a longer period of time...???????????<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="color:black"> <o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="color:black">I just bought six new 5s-LiPo Packs and I'm new to this stuff... So what say you experienced folks?<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="color:black"> <o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="color:black">Larry Diamond<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="color:black"> <o:p></o:p></span></p>
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