From owner-freebsd-mobile@FreeBSD.ORG Thu Oct 20 10:37:03 2011 Return-Path: Delivered-To: freebsd-mobile@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 354C71065670 for ; Thu, 20 Oct 2011 10:37:03 +0000 (UTC) (envelope-from rb@gid.co.uk) Received: from mx0.gid.co.uk (mx0.gid.co.uk [194.32.164.250]) by mx1.freebsd.org (Postfix) with ESMTP id C0ECC8FC0A for ; Thu, 20 Oct 2011 10:37:02 +0000 (UTC) Received: from [192.168.0.236] (87-194-64-74.dsl.cnl.uk.net [87.194.64.74]) by mx0.gid.co.uk (8.14.2/8.14.2) with ESMTP id p9KAI97V051884; Thu, 20 Oct 2011 11:18:09 +0100 (BST) (envelope-from rb@gid.co.uk) Mime-Version: 1.0 (Apple Message framework v1084) Content-Type: text/plain; charset=us-ascii From: Bob Bishop In-Reply-To: Date: Thu, 20 Oct 2011 11:18:04 +0100 Content-Transfer-Encoding: quoted-printable Message-Id: <134A4C4B-A44A-4151-8425-09C6ADD2C69A@gid.co.uk> References: <201110182335.15862.onyx@z-up.ru> <201110190844.17703.onyx@z-up.ru> <201110191713.02435.onyx@z-up.ru> <4E9F0A0E.10009@paz.bz> To: Warner Losh X-Mailer: Apple Mail (2.1084) Cc: freebsd-mobile@freebsd.org, Jim Pazarena Subject: Re: Battery charge limiting X-BeenThere: freebsd-mobile@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Mobile computing with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 20 Oct 2011 10:37:03 -0000 Hi, On 19 Oct 2011, at 19:49, Warner Losh wrote: > Mac OS doesen't do this for batteries "sealed" into the case, so I too = have my doubts about these assertions. Does anybody have any studies = with hard data to back up this conventional wisdom? I believe that Mac battery controllers severely limit the charge rate as = the battery approaches full charge. Hybrid vehicles typically limit their traction batteries within 20% - = 80%, but they are mostly NiMH. I don't know of any hard data for Li-ion. -- Bob Bishop rb@gid.co.uk