From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jachym Cepicky Subject: incorrect battery design capacity Date: Mon, 23 Feb 2009 09:18:18 +0100 Message-ID: <1235377098.7046.20.camel@kocour> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: Received: from mail-fx0-f167.google.com ([209.85.220.167]:49542 "EHLO mail-fx0-f167.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752889AbZBWISX (ORCPT ); Mon, 23 Feb 2009 03:18:23 -0500 Received: by mail-fx0-f167.google.com with SMTP id 11so1456055fxm.13 for ; Mon, 23 Feb 2009 00:18:22 -0800 (PST) Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: linux-acpi@vger.kernel.org Hi, if I'm in wrong mailing list, my apologizes, plese point me to the right one. It is truth, that my laptop is about 3 years old, and so, I can not expect miracles from my battery, however, I would call this an bug: I have HP Compaq nx6125 and on the battery it is written, that it is 10.8V - 4.8 Ahr, which I understand, that capacity of my battery is 4800 mAh. However, cat /proc/acpi/battery/C179/info present: yes design capacity: 638 mAh last full capacity: 638 mAh battery technology: rechargeable design voltage: 11100 mV design capacity warning: 32 mAh design capacity low: 7 mAh capacity granularity 1: 100 mAh capacity granularity 2: 100 mAh model number: Primary serial number: 03740 2006/01/12 battery type: LIon OEM info: Hewlett-Packard The last full/design capacity ratio is (after 3 years) impressive. But I would expect the design capacity little bit (about 7.5x?) higher. Is it the bug of acpi? Kernel? Do I have to buy me a new battery? Can I set somehow design capacity by hand? Linux kocour 2.6.27-11-generic #1 SMP Thu Jan 29 19:24:39 UTC 2009 i686 GNU/Linux Ubuntu 8.10 acpi 1.1 Thanks Jachym -- Jachym Cepicky e-mail: jachym.cepicky gmail com URL: http://les-ejk.cz GPG: http://les-ejk.cz/pgp/JachymCepicky.pgp