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Date:         Tue, 26 Jan 2010 12:09:40 -0800
Reply-To:     Al Knoll <anasasi@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Al Knoll <anasasi@GMAIL.COM>
Subject:      Re: How do you tell how much juice a battery has/?
Comments: To: Don Hanson <dhanson928@gmail.com>
In-Reply-To:  <6bc66ccf1001261149v43c7ec07i49b75366b4a2830a@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1

specific gravity of the electrolyte at a particular temperature will give you what you seek wont work for sealed batteries though

On Tue, Jan 26, 2010 at 11:49 AM, Don Hanson <dhanson928@gmail.com> wrote:

> Is there a way to tell about the auxilliary battery condition in a VW (or > any rig, for that matter)? I've been working with all kinds of batteries > over the years and I always have been puzzled about how to find out what I > might expect from the battery. I have a digital multimeter and I get > voltage readings but I'm told that is no real indicator of how good the > battery is charged or is capabale of being charged... > Is there an instrument that I could wire into my systems (I have a few > different vehicles with multiple battery systems) where I might get an > actual meaningful readout that would tell me..."Hey, don't expect much more > from this battery till you charge it more" or "this battery is shot" or > "all > your batteries are in fine shape with 100% charge"? > I have seen battery condition indicator gauges in yachts..I've seen > voltage indicators on some rigs. My travel trailer has an LED readout and > for that matter, so does my semi-westie van...but those things seem pretty > much a joke... > What should I wire into my systems to give me a better handle on how much > juice I have in the batteries? Is there anything that works..or do I just > have to keep guesstimating as I have been doing all these years? > Thanks, Don Hanson >


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