<html><head></head><body><div class="ydp6a9917dayahoo-style-wrap" style="font-family:Arial, Helvetica, sans-serif;font-size:16px;"><div><div dir="ltr" data-setdir="false">It all depends on the level of charge. A fully charged battery will freeze at about -70 deg F but a fully discharged battery will freeze at 32 deg F. At 50% charge it will freeze at about -15 deg F. An AGM battery is a bit lower. Below is a curve from USBattery.com</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false"><img title="Inline image" alt="Inline image" src="cid:b31e0e2d-a19b-53cc-557f-1facd418afc6@yahoo.com" class="yahoo-inline-image" draggable="false" style="max-width: 555px; width: 100%;" data-id="<b31e0e2d-a19b-53cc-557f-1facd418afc6@yahoo.com>"><br><span></span><br></div><div dir="ltr" data-setdir="false">Since you live in an area that can expect sub-zero (F) temperatures at some point over the winter leaving it out with a state of charge less than 60% is risky.</div><div><br></div><div class="ydp6a9917dasignature"><div style="color: black; font-style: normal; font-size-adjust: none; font-weight: normal; font-stretch: normal; font-size: 12pt; line-height: normal; font-family: Arial, Helvetica, sans-serif;"><div style="color: black; font-style: normal; font-size-adjust: none; font-weight: normal; font-stretch: normal; font-size: 12pt; line-height: normal; font-family: Arial, Helvetica, sans-serif;"><div><font size="4">Dave <br></font></div><div><span style="font-size:10.0pt;font-family:sans-serif;color:black;"><br></span></div><br></div></div></div></div>
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On Friday, November 14, 2025 at 02:39:12 AM CST, Philip Ethier <pethier7@gmail.com> wrote:
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<div><div id="ydp504f502yiv7157825480"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div style="font-family:monospace;" class="ydp504f502yiv7157825480gmail_default"><br></div></div><br><div class="ydp504f502yiv7157825480gmail_quote"><div dir="ltr" class="ydp504f502yiv7157825480gmail_attr">On Fri, Nov 14, 2025 at 1:34 AM Philip Ethier <<a href="mailto:pethier7@gmail.com" rel="nofollow" target="_blank">pethier7@gmail.com</a>> wrote:<br></div><blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex;" class="ydp504f502yiv7157825480gmail_quote"><div dir="ltr"><div><div style="font-family:monospace;">Absorbed Gas Mat batteries:</div></div></div></blockquote><div><br></div><div style="font-family:monospace;" class="ydp504f502yiv7157825480gmail_default">OOPS. <span style="color:inherit;font-size:inherit;font-style:inherit;font-weight:inherit;font-family:Georgia, Times, Serif serif;">Absorbent glass mat</span></div><blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex;" class="ydp504f502yiv7157825480gmail_quote"><div dir="ltr"><div><div style="font-family:monospace;"><br></div><div style="font-family:monospace;">If you leave a vehicle outside all winter in a cold climate without charging the AGM batteries, will they be ruined by the cold?</div><div style="font-family:monospace;"><br></div><div style="font-family:monospace;">I know that regular lead-acid batteries can freeze up, but I don't know about AGM batteries.</div><br clear="all"></div><div><br></div><span class="ydp504f502yiv7157825480gmail_signature_prefix">-- </span><br><div dir="ltr" class="ydp504f502yiv7157825480gmail_signature"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div><span style="color:rgb(0,0,0);font-size:12.8px;background-color:rgb(255,255,255);"><font face="monospace" style="background-color: inherit;">Phil Ethier, West Side, Saint Paul Minnesota, USA</font></span></div><div><span style="font-family:monospace;color:rgb(0,0,0);">2006 Gulf Stream Conquest Super C, 8.1, white</span></div><div><span style="color:rgb(0,0,0);background-color:rgb(255,255,255);"><font face="monospace" style="background-color: inherit;">2011 Cayman 2.9 PDK, white</font></span></div><div><span style="color:rgb(0,0,0);background-color:rgb(255,255,255);"><font face="monospace" style="background-color: inherit;">2021 Ford F-150 3500cc twin turbo, white</font></span></div><div><span style="background-color:rgb(255,255,255);"><font face="monospace" style="background-color: inherit;">1991 Caterham 1700 Super Sprint, not white</font><br style="color:rgb(0,0,0);font-family:verdana, geneva, lucida, arial, helvetica, sans-serif;"><a href="http://www.mnautox.com/" style="color:rgb(0,24,57);font-family:verdana, geneva, lucida, arial, helvetica, sans-serif;" rel="nofollow" target="_blank">www.mnautox.com<br></a></span><br></div></div></div></div></div></div></div>
</blockquote></div><div><br clear="all"></div><div><br></div><span class="ydp504f502yiv7157825480gmail_signature_prefix">-- </span><br><div dir="ltr" class="ydp504f502yiv7157825480gmail_signature"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div><span style="color:rgb(0,0,0);font-size:12.8px;background-color:rgb(255,255,255);"><font face="monospace" style="background-color: inherit;">Phil Ethier, West Side, Saint Paul Minnesota, USA</font></span></div><div><span style="font-family:monospace;color:rgb(0,0,0);">2006 Gulf Stream Conquest Super C, 8.1, white</span></div><div><span style="color:rgb(0,0,0);background-color:rgb(255,255,255);"><font face="monospace" style="background-color: inherit;">2011 Cayman 2.9 PDK, white</font></span></div><div><span style="color:rgb(0,0,0);background-color:rgb(255,255,255);"><font face="monospace" style="background-color: inherit;">2021 Ford F-150 3500cc twin turbo, white</font></span></div><div><span style="background-color:rgb(255,255,255);"><font face="monospace" style="background-color: inherit;">1991 Caterham 1700 Super Sprint, not white</font><br style="color:rgb(0,0,0);font-family:verdana, geneva, lucida, arial, helvetica, sans-serif;"><a href="http://www.mnautox.com/" style="color:rgb(0,24,57);font-family:verdana, geneva, lucida, arial, helvetica, sans-serif;" rel="nofollow" target="_blank">www.mnautox.com<br></a></span><br></div></div></div></div></div></div></div>
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