Archived posting to the Leica Users Group, 1998/09/09

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Subject: Re: [Leica] R8 + Winder: Lithium Battery power curve
From: "Dan Post" <dwpost@email.msn.com>
Date: Wed, 9 Sep 1998 18:20:19 -0400

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Greg-
A friend of mine works at the Eveready plant in Asheboro, NC and  gave =
me some useful info-  These batteries were developed and expanded during =
the Vietnam War where high energy density was needed in a relatively =
lightweight battery for field communication equipment. They no longer =
have the tooling for these batteries, but periodically take some of the =
first production off the shelf and test them. After twenty five years or =
more, the output of the lithium batteries is more than 99% of the =
original rated power. He says they put a ten year date on the batteries, =
but they really don't know how long they'll last since the first onces =
produced, and stored are still very functional!
Carrying a couple of sets of batteries is not a bad idea in any case- I =
carry several spare 1/3 Ns for the R8, and AAs for the MD, when I carry =
it! It appears that lithium technology may take another advance once =
they come up with popular sized lithium rechargeables- the same =
advantages of regular lithium, and you can re-use them over and over!=20
Dan
dwpost@msn.com

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<DIV><FONT color=3D#000000 size=3D2>Greg-</FONT></DIV>
<DIV><FONT color=3D#000000 size=3D2></FONT><FONT size=3D2>A friend of =
mine works at=20
the Eveready plant in Asheboro, NC and&nbsp; gave me some useful =
info-&nbsp;=20
These batteries were developed and expanded during the Vietnam War where =
high=20
energy density was needed in a relatively lightweight battery for field=20
communication equipment. They no longer have the tooling for these =
batteries,=20
but periodically take some of the first production off the shelf and =
test them.=20
After twenty five years or more, the output of the lithium batteries is =
more=20
than 99% of the original rated power. He says they put a ten year date =
on the=20
batteries, but they really don't know how long they'll last since the =
first=20
onces produced, and stored are still very functional!</FONT></DIV>
<DIV><FONT size=3D2>Carrying a couple of sets of batteries is not a bad =
idea in=20
any case- I carry several spare 1/3 Ns for the R8, and AAs for the MD, =
when I=20
carry it! It appears that lithium technology may take another advance =
once they=20
come up with popular sized lithium rechargeables- the same advantages of =
regular=20
lithium, and you can re-use them over and over! </FONT></DIV>
<DIV><FONT size=3D2>Dan</FONT></DIV>
<DIV><FONT size=3D2></FONT><FONT color=3D#000000 size=3D2><A=20
href=3D"mailto:dwpost@msn.com">dwpost@msn.com</A></FONT></DIV></BODY></HT=
ML>

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