[ltp] Running with line power and no battery

Thu, 28 Feb 2008 17:02:46 +0100

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Henrique de Moraes Holschuh wrote:
<blockquote cite="mid:20080228145332.GC3097@khazad-dum.debian.net"
 type="cite">
  <pre wrap="">On Thu, 28 Feb 2008, Arno Trautmann wrote:
  </pre>
  <blockquote type="cite">
    <blockquote type="cite">
      <pre wrap="">Every non-ancient ThinkPad works fine without a battery, AFAIK.  But I'd
still rather use a screwed-up 5s-of-charge-only old battery than run the
laptop without any secondary power source it can count on.
      </pre>
    </blockquote>
    <pre wrap="">Just yesterday I read the thinkwiki, which tells me:

???Battery health

Batteries, especially of the modern Li-Ion type, wear out quicker when  
they hold a large charge or are subject to higher temperatures (see 
above).

If you use your laptop at a desk, reduce battery wear by maintaining an  
appropriate charge level. When possible, remove Li-ion batteries while  
operating from AC as the notebook gets hot enough inside for that to  
damage the battery in the long run, even if charging is stopped.???

[<a class="moz-txt-link-freetext" href="http://www.thinkwiki.org/wiki/Maintenance#Battery_treatment">http://www.thinkwiki.org/wiki/Maintenance#Battery_treatment</a>]

So I mostly run my X61s without battery and never got any problems.
    </pre>
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  <pre wrap=""><!---->
ThinkWiki is correct.

But as always, there is another side to the issue.  
...
  </pre>
</blockquote>
I totally agree with Henrique on this.<br>
<br>
>From ThinkWiki I followed an external link to BatteryUniversity.com
(<a class="moz-txt-link-freetext" href="http://www.batteryuniversity.com/parttwo-34.htm">http://www.batteryuniversity.com/parttwo-34.htm</a>) and with that
knowledge I decided to setup my batter to never fully charge (I keep it
at 70%, and it starts to fill if it falls below 40%) by changing
/sys/devices/platform/smapi/BAT*/stop_charge_thresh and
start_charge_thresh. BTW, can my friend who uses Windows do this easily?<br>
<br>
Simply because I find my data much more valuable than a rechargeable
battery which you can buy any day in a store.<br>
Maybe my decision can be explained by me already experiencing data loss
once. Never again.<br>
<br>
If financing the battery is what troubles you, I wouldn't recommend you
to get cheap when finding a replacement battery (I have to be honest
here, this isn't from my own experience but from stories of other
having burn themselves -- some even literally -- by buying cheap
batteries) but to simply try to plan for that day when it comes. <br>
If you predict your battery will last X number of years (help here? how
can one do that fairly correctly?) and then just divide the cost of the
battery by the number of months or weeks, you may realize it's not that
big of a deal (and definitely not worth risking power and data loss,
which is my case).<br>
<br>
At the end it definitely comes down to what's worth more for you...<br>
<br>
<div class="moz-signature">-- <br>
Dom <br>
<a class="moz-txt-link-freetext" href="http://domdelimar.com">http://domdelimar.com</a>
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