[ltp] One battery or two?

[Michael Gaber]

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Philipp Kern schrieb:
> On Thu, Oct 02, 2008 at 10:02:23PM +0200, Michael Gaber wrote:
>> nope. there are 2 files in smapi: start_charge_threshold (1) and
>> stop_charge_threshold (2). my current setting is (1) at 30% and (2) at
>> 70% so my thinkpad will not charge the battery at all if it has between
>> 30 and 70% of it's capacity. it will NOT discharge the battery while
>> plugged in, so you perhaps save yourself some cycles (doubt that) but
>> keep the battery away from the bad last 20 or so % which stress the
>> cells extremely when charged because the controller has to use high
>> voltages to charge the cells.
>>
>> with this setting I'm currently at 16.38% capacity loss of my nearly 2
>> year old 9-cell battery of my t60 with 354 cycles on it
> 
> How do you keep these settings?  Own init script at boot which sets
> them?
> 
> Kind regards,
> Philipp Kern

sry forgot to attach the script that is used within...

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#!/bin/bash
modprobe tp_smapi
echo 30 > /sys/devices/platform/smapi/BAT0/start_charge_thresh
echo 70 > /sys/devices/platform/smapi/BAT0/stop_charge_thresh

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