linux-kernel - Re: Low-Level and Long-Term Battery Control

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Message-ID: <4BCBDCA1.9030500@myrealbox.com>
Date:	Mon, 19 Apr 2010 00:31:29 -0400
From:	Andy Lutomirski <luto@...ealbox.com>
To:	Mohamed Ikbel Boulabiar <boulabiar@...il.com>
CC:	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: Low-Level and Long-Term Battery Control

Mohamed Ikbel Boulabiar wrote:
> Hi,
> 
> Is there any function in the Linux kernel that control the
> charging/discharging of the battery to provide better lifespan ?
> (add some years to its life ?)
> 
> For Laptops, it is better to extract the battery from the Laptop when
> the computer will be on power for a long period.
> I ask if the kernel can do such control without the user intention and
> in an automatic way.
> 
> Some BIOS provide to the user to select whether to block the battery
> charging to 50% to make it stand for more time.
> And Many people (like me) forget their laptops on power until the
> battery no more can hold energy after 2minutes of no power.
> 

On ThinkPads, tp_smapi (not in the kernel.org kernel) can do it.  I'd 
like to see this feature standardized in sysfs.

--Andy
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