From owner-freebsd-acpi@FreeBSD.ORG Mon Mar 15 21:20:28 2010 Return-Path: Delivered-To: freebsd-acpi@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id C8B431065677 for ; Mon, 15 Mar 2010 21:20:28 +0000 (UTC) (envelope-from j@uriah.heep.sax.de) Received: from uriah.heep.sax.de (uriah.heep.sax.de [213.240.137.9]) by mx1.freebsd.org (Postfix) with ESMTP id 6A9718FC1C for ; Mon, 15 Mar 2010 21:20:28 +0000 (UTC) Received: by uriah.heep.sax.de (Postfix, from userid 107) id E2E0B1C; Mon, 15 Mar 2010 22:20:26 +0100 (MET) Date: Mon, 15 Mar 2010 22:20:26 +0100 From: Joerg Wunsch To: freebsd-acpi@freebsd.org Message-ID: <20100315212026.GH52442@uriah.heep.sax.de> References: <20100315062028.GC52442@uriah.heep.sax.de> <4B9E912E.4000409@root.org> <20100315201216.GF52442@uriah.heep.sax.de> <7d6fde3d1003151400t7af423e9h3a5af79f7c77e293@mail.gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <7d6fde3d1003151400t7af423e9h3a5af79f7c77e293@mail.gmail.com> X-Phone: +49-351-2012 669 X-PGP-Fingerprint: DC 47 E6 E4 FF A6 E9 8F 93 21 E0 7D F9 12 D6 4E X-GPG-Fingerprint: 5E84 F980 C3CA FD4B B584 1070 F48C A81B 69A8 5873 User-Agent: Mutt/1.5.20 (2009-06-14) Subject: Re: Funny battery values (nx6325) X-BeenThere: freebsd-acpi@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: Joerg Wunsch List-Id: ACPI and power management development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 15 Mar 2010 21:20:28 -0000 As Garrett Cooper wrote: > > I think the 2 A are realistic. With a 5100 mAh capacity, it should > > result in somewhat more than 2 hours of run time (maybe more if the > > laptop eventually goes idle, and reduces CPU speed). > If you were pulling 2 A, that's be the same approximate amount as > many 2 x 1U servers. Remember, this is measured at 10.8 V (or whatever the actual value is) battery voltage... The laptop is running on batteries here, how should it be able to measure the mains voltage/current? (Despite, the mains part of the supply is completely decoupled by the PSU.) This is what I'm getting on an old TP600E machine: dhcp208# acpiconf -i 0 Design capacity: 34560 mWh Last full capacity: 14080 mWh Technology: secondary (rechargeable) Design voltage: 10800 mV Capacity (warn): 1728 mWh Capacity (low): 345 mWh Low/warn granularity: 1 mWh Warn/full granularity: 1 mWh Model number: ThinkPad Battery Serial number: Type: LION OEM info: IBM Corporation State: discharging Remaining capacity: 99% Remaining time: 1:18 Present rate: 10641 mW Voltage: 11850 mV 10.6 W / 11.85 V = 0.9 A (the machine was idle here) No idea why the Thinkpad is returning Watts instead of Amperes, as most other ACPI BIOSes do. -- cheers, J"org .-.-. --... ...-- -.. . DL8DTL http://www.sax.de/~joerg/ NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-)