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<DIV><FONT face=Arial size=2>The more relevant spec on (deep cycle) lead acid
batteries is the reserve capacity (RC) and is expressed in minutes (defined as
minutes @ 25A to 10.5v). As a pair of Astros will draw about 20A @ 12v (240W)
the RC pretty much indicates the useful charge time.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Earl</FONT></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=bob@toprudder.com href="mailto:bob@toprudder.com">Bob Richards</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> Tuesday, April 18, 2006 8:29
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion]
Electrics</DIV>
<DIV><BR></DIV>
<DIV>Dave,</DIV>
<DIV> </DIV>
<DIV>All the literature I have seen for rating the amp-hour capacity of
lead-acid batteries use a 20 hour discharge rate. So, in your case, that would
be about 5 amps. Obviously, if you draw more than 5 amps, you will not
get the rated capacity.</DIV>
<DIV> </DIV>
<DIV>Bob R.</DIV>
<DIV><BR><BR><B><I>David Lockhart <<A
href="mailto:DaveL322@comcast.net">DaveL322@comcast.net</A>></I></B>
wrote:</DIV>
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<DIV><FONT face=Arial size=2>FWIW - I've been using a Sears Marine part
#27582 lead acid battery as a power source at the field. Weight is
about 65 pounds. Rated capacity is 108 amps (can't remember what
discharge rate was used to yield that capacity).</FONT></DIV></BLOCKQUOTE>
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