X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 1 [X] Return-Path: Received: from conrad.preludeconcepts.com ([64.18.208.18] verified) by logan.com (CommuniGate Pro SMTP 5.1.6) with ESMTP id 1821081 for flyrotary@lancaironline.net; Wed, 07 Feb 2007 07:31:36 -0500 Received-SPF: none receiver=logan.com; client-ip=64.18.208.18; envelope-from=crj@lucubration.com Received: from [10.201.1.6] (unknown [10.201.1.6]) by conrad.preludeconcepts.com (Postfix) with ESMTP id CE03F17CC13A for ; Wed, 7 Feb 2007 07:30:28 -0500 (EST) Message-ID: <45C9C667.4050307@lucubration.com> Date: Wed, 07 Feb 2007 07:30:31 -0500 From: Chad Robinson User-Agent: Thunderbird 1.5.0.9 (Windows/20061207) MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Finally built - 3.7 lb, 600 cranking amp, 11.5 A-hr battery References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-MailScanner: Found to be clean X-Spam-Status: No Bill Dube wrote: > These are not the delicate Li-Ion cells that they put in your > laptop or cellphone. Fair enough. Bill, it's common to develop a maintenance cycle for lead acids. Because they lose capacity over their usage lifetimes most people recommend replacement after a year or two of usage. How do these compare? Assuming no 'abuse', how long will they last, and should they be replaced on a schedule? Also, will they lose charge while stored, and how quickly compared to a lead acid? Will a lead acid trickle charger work to maintain these, or is something special required? Thanks, Chad