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Date:         Thu, 20 Sep 2012 23:23:51 -0400
Reply-To:     David Beierl <dbeierl@ATTGLOBAL.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         David Beierl <dbeierl@ATTGLOBAL.NET>
Subject:      Re: [Nearly Off-Topic] Seeking Battery Switch
Comments: To: Dennis Haynes <d23haynes57@HOTMAIL.COM>
In-Reply-To:  <BAY152-ds1735C69E66F860E482374EA0990@phx.gbl>
Content-Type: text/plain; charset="us-ascii"; format=flowed

At 08:18 PM 9/20/2012, Dennis Haynes wrote:
>available. Do keep in mind that each time you "top off" (80-100%) the
>battery you are doing a charge cycle which is  limiting factor of battery
>life.


But as a compensating factor, you get many more cycles of life when
doing shallow discharges.  I was just looking at an off-grid site
that figures you get best lifetime cost if you limit your discharge
depth not to fifty per cent but thirty-five!  That's leaving 65% in
the can all the time!  On Scamp I used to run to 80%, accepting
higher total cost but saving weight and initial cost.


Yours,
David
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