[ltp] Problems with (non-Lenovo) battery

Dan M. linux-thinkpad@linux-thinkpad.org
Wed, 15 Dec 2010 17:35:39 -0500

I have purchased a few batteries from:

They have held up very well and are as close in runtime to the
originals that I have found.


On 15/12/2010, Dave Cunningham <sparkprime@gmail.com> wrote:
> I bought a non-lenovo battery for my W700DS and found that it could not
> supply enough power -- The machine can be used on battery as long as you
> don't try and do any intense graphical work that uses the GPU.  If you do
> that, it will power off immediately.
> Intensive CPU + hard disk + wifi is OK, however.  It is just the GPU as f=
> as I can tell.
> Also the cheap battery lost the top 15% of its capacity within the first
> month.
> i still use the cheap battery on transatlantic flights but I have to
> structure my work so I can do a few contiguous hours of non-graphical wor=
> It is quite irritating.  I have 2 lenovo batteries that are fine, however=
> On Sun, Dec 12, 2010 at 9:27 AM, Arno Trautmann
> <Arno.Trautmann@gmx.de>wrote:
>> Hi all!
>> I'm using an X61s with Arch Linux.
>> Two questions, short one first:
>> The wifi-light of my machine keeps blinking. The connection is ok and
>> stable, but it blinks with about 2Hz frequency. This is quite annoying
>> when I try to concentrate. Any idea to prevent it from blinking?
>> Long question:
>> Some time ago my original battery (8-cell) lost its capacitance and I
>> needed a new one. As they are quite expensive, I bought one
>> non-original. (also 8-cell) That one works fine, except for longer times
>> on battery:
>> /proc/acpi/battery/BAT0/state
>> present:                 yes
>> capacity state:          ok
>> charging state:          charged
>> present rate:            0 mW
>> remaining capacity:      62290 mWh
>> present voltage:         15765 mV
>> This file may show a remaining capacity of, say , 40000mWh, but suddenly
>> the machine just turns off. When connected to power supply again, I get
>> capacitance close to the value before, so the power is not just "lost"
>> anyhow.
>> However, I guess it might be that the voltage drops below some critical
>> value (is below 15V then) that might be slightly higher on original
>> batteries. Is that possible? If so, is there a way to prevent the
>> machine from shutting down by decreasing this value slightly?
>> I=E2=80=99m happy for any suggestions,
>> cheers
>> Arno

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