Date: Wed, 17 Mar 2010 08:45:49 +0100 From: Joerg Wunsch <j@uriah.heep.sax.de> To: freebsd-acpi@freebsd.org Subject: Re: Funny battery values (nx6325) Message-ID: <20100317074549.GC52442@uriah.heep.sax.de> In-Reply-To: <20100317070428.GA2924@server.vk2pj.dyndns.org> References: <20100315062028.GC52442@uriah.heep.sax.de> <20100317070428.GA2924@server.vk2pj.dyndns.org>
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As Peter Jeremy wrote: > >Design capacity: 279 mAh > >Last full capacity: 279 mAh > Is this consistent or does it vary from boot to boot or if you > disconnect and reconnect the battery? Currently, my wife is on a business trip with that machine. Hopefully, I'll also get a statement about how long it lasts on battery once she is back ;-), and I'll re-check those values then. > >The battery is declared as 55 Wh, which would correspond to 5.1 Ah > >(probably 3 x 2 x 18650 cells). > > But is also over 3 years old. Almost everything you do to LiION > batteries makes their capacity drop. That's right, but it wouldn't be supposed to affect the "Design capacity", would it? ;) Can anybody tell where these values actually come from? I could perhaps even build a small microcontroller gadget, in order to query the battery for its values offline (using I²C aka SMbus) in order to see where the mistake might be. -- cheers, J"org .-.-. --... ...-- -.. . DL8DTL http://www.sax.de/~joerg/ NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-)
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