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Date:         Mon, 29 Jul 2002 20:47:36 -0400
Reply-To:     JM/CO <jmerritt2@CAPECOD.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         JM/CO <jmerritt2@CAPECOD.NET>
Subject:      Re: Batteries in parallel?
Comments: To: George Averill <averill@LDL.NET>
Content-Type: text/plain; charset="iso-8859-1"

It is never a good idea to leave batteries connected in a parallel arrangement unless the following conditions are met 1) The circuit is in ( or near ) constant use, where frequent charging is happening. 2) The batteries are connected in parallel temporarily by a switch for purposes ( let's say ) of starting an engine with partially depleted batteries, and than, after the engine is started, the switch is restored to the non - parallel mode. This is a common marine arrangement. Batteries connected in parallel in other than the above situations will tend to discharge each other, as the odds of their internal resistances being the same ( required condition for zero current flow ) are next to impossible. Chuck '83 Westy '84 Jag XJ-6 VDP -----Original Message----- From: George Averill <averill@LDL.NET> To: vanagon@GERRY.VANAGON.COM <vanagon@GERRY.VANAGON.COM> Date: Sunday, July 28, 2002 4:30 PM Subject: Batteries in parallel?

Does anyone have any information concerning problems which may result from connecting two 12 v. batteries in parallel to obtain more current? Seems like I remember that there are problems to be considered, but can't remember exactly what the problems were. Maybe some solutions? George


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