From owner-freebsd-stable@FreeBSD.ORG Wed Sep 26 00:10:28 2012 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 030B7106566C for ; Wed, 26 Sep 2012 00:10:28 +0000 (UTC) (envelope-from michael.schuh@gmail.com) Received: from mail-ie0-f182.google.com (mail-ie0-f182.google.com [209.85.223.182]) by mx1.freebsd.org (Postfix) with ESMTP id B7D178FC0C for ; Wed, 26 Sep 2012 00:10:27 +0000 (UTC) Received: by ieak10 with SMTP id k10so69044iea.13 for ; Tue, 25 Sep 2012 17:10:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=YAVNSJX0sXJIUE5YG6+ATrKbC9qID6/d31nk0+VSwFI=; b=lsSdrmI6PvsnrJZ0xDkRFzG+RvKG3NN9PjGCe4KPikLNGX2pEt1yeZull8C0GR+8J8 VD/9e2DlBpyTN4VAqW60X+F3fnC+GrG3O4UilI8a06YkRhA4Av8u7Rv5WYHNLk3UJtRV vgI8gpEcOG5sAeBlG+2S++PILwFMxTJYHd/FKE9iJSsu5wApOk9JVxsYq1GS0GHUvVDO 2cJ8O0o3yGWV9tWKRy2LWMCpepTBXXxodPJk9wxSEmPcZL5FPr4EdY2dOjq9IJBGEel6 We+flhcL+yDavoFBiaQASupJURcJ21ykwnJbIa8axe72BGSVwGKD6jD1UJSe0bWEPbcz ioeQ== MIME-Version: 1.0 Received: by 10.50.11.194 with SMTP id s2mr9773417igb.24.1348618221038; Tue, 25 Sep 2012 17:10:21 -0700 (PDT) Received: by 10.64.58.227 with HTTP; Tue, 25 Sep 2012 17:10:21 -0700 (PDT) In-Reply-To: References: Date: Wed, 26 Sep 2012 02:10:21 +0200 Message-ID: From: Michael Schuh To: Brandon Allbery Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: FreeBSD Stable Subject: Re: battery state - hw.acpi.battery.life goes only down X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 26 Sep 2012 00:10:28 -0000 2012/9/26 Brandon Allbery > On Tue, Sep 25, 2012 at 7:43 PM, Michael Schuh w= rote: > >> this wrong number seems persistent during a reboot. >> i tested this, shortly. >> the battery life after reboot was 97% with power supply plugged in all t= he >> times. >> >> after a clean boot the system camed up with a battery.life of 97% ( powe= r >> supply plugged in :O ). >> > > Sounds like normal lithium ion charger behavior to me; typically they > won't kick in the charger until it reaches somewhere between 90-95% > (depends on the device). This extends the useful life of the battery; ra= w > lithium ion is just as (actually, more) prone to destruction via > overcharging as other battery technologies. > > http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries= discusses this. Note in particular: "A continuous trickle charge would > cause plating of metallic lithium, and this could compromise safety." > > -- > brandon s allbery allbery.b@gmail.co= m > wandering unix systems administrator (available) (412) 475-9364 vm/sm= s > > hmm, may be. i didn't thinked about that lithium charging feature. you may right with that. but one point, this behaviour is new. i made some tests to check if my conkyrc is right and there i haven't wait that the battery is gone under 90% for checking this. after i could confirm that the conkyrc is syntactically correct, the battery reached 100% again. that was before i updated the system last week. i will check that out. under the load of a make world it should only take minutes to get the battery.life under 80%. many thanks for your hint. --=20 =3D =3D =3D http://michael-schuh.net/ =3D =3D =3D Projektmanagement - IT-Consulting - Professional Services IT Michael Schuh Postfach 10 21 52 66021 Saarbr=FCcken phone: 0681/8319664 mobil: 0175/5616453 @: m i c h a e l . s c h u h @ g m a i l . c o m =3D =3D =3D Ust-ID: DE251072318 =3D =3D =3D