Date:         Fri, 20 Jun 2008 20:38:51 +0000
Reply-To:     Trvlr2001@COMCAST.NET
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         "John C..." <Trvlr2001@COMCAST.NET>
Subject:      Re: Costco Group 47 - cheap aux battery option

Absolutely True, No Doubt, but ....
When ya can buy 3 cheapies
for the price of a nice one ?
And a guys a little sloppy
in maintaining the battery's,,,
And as discussed before
Wally Marts no question
trade in!
How does that affect the average?
JC...
PS: I mean,
Sure, I'd like hair ....
but look how much I'm a savin' on hair cuts !!!! ;o)

-------------- Original message --------------
From: Al Knoll <anasasi@GMAIL.COM>

> The house battery as as been discussed before has different operating
> parameters than the starting battery. CCA is a measure of how much
> current can be delivered for a short period of time (no pun intended).
> A house battery does better if it is designed to deliver smaller
> currents (<30A) over a longer period of time.
>
> The starting battery has porous plates so the maximum electrolyte to
> plate contact is available for high current applications. The plate
> surface per cell dictates how fast the electrochemical reaction can
> proceed. The more contact the faster it goes and the more current
> that can be drawn. However this configuration of plates is not well
> suited to small <30 current draw over longer periods of time. For
> that application a solid plate is best. Batteries that have these
> sorts of plates don't deliver much in the way of CCA but do have a
> larger reserve capacity measured usually in Ampere Hours. They're more
> resilient and longer lasting than a starting battery of the same
> physical size used as a deep discharge current source. More charge
> discharge cycles without damage.
>
>
> On 6/20/08, Troy wrote:
> > Here's a link to various group sizes of batteries and thei r demensions. FWIW,
> the 40R, (not mentioned) has one of the highest AH ratings of them all, with
> lots of room to spare. Sears also has a 5 yr warranty, no questions asked for
> the 1st 3, then prorated thereafter. Don't forget to cover the underside of the
> cover (or battery terminals) with non conductive material!
> >
> >
> > http://www.batteryweb.com/bci.cfm.
> >
> > Troy
> >