<p dir="ltr">Also page <a href="http://wiki.laptop.org/go/XO_Troubleshooting_Battery">http://wiki.laptop.org/go/XO_Troubleshooting_Battery</a> used to be very relevant, and hopefully still offers useful context/tips, given the sad unavailability of new batteries (as I understand it) for the 2 million or so XO-1 and XO-1.5 laptops out there in the world.</p>
<p dir="ltr">For the much smaller RTC (real time click) batteries on the motherboard, does anybody know if XO-1.5 and higher "leggy" RTC batteries are purchasable anywhere? As described here:</p>
<p dir="ltr"><a href="http://wiki.laptop.org/go/Fix_Clock#XO-1.5">http://wiki.laptop.org/go/Fix_Clock#XO-1.5</a></p>
<p dir="ltr">Great photo here:</p>
<p dir="ltr"><a href="http://wiki.laptop.org/go/File:Xo_1_5_coincell.jpg">http://wiki.laptop.org/go/File:Xo_1_5_coincell.jpg</a></p>
<div class="gmail_quote">On Aug 10, 2015 2:52 AM, "James Cameron" <<a href="mailto:quozl@laptop.org">quozl@laptop.org</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">G'day Sora,<br>
<br>
You asked about the run time of XO-1 batteries. Quick answer; maybe<br>
another 1800 cycles, less in tropical heat, and two hours seems normal.<br>
<br>
Long answer:<br>
<br>
Our specification says XO-1 batteries should survive 2000 charge<br>
discharge cycles and still be within 50% of as-new capacity, when used<br>
at 25°C.<br>
<br>
A cycle is from 0% to 100% to 0% again. If any of those 200 cycles<br>
were not complete, then less than 200 cycles will have been<br>
experienced.<br>
<br>
So for the batteries you describe, there should be of the order of<br>
1800 cycles remaining, subject to the elevated tropical temperatures<br>
in Haiti.<br>
<br>
I understand you have recently upgraded the software.<br>
<br>
The latest software is more usable, therefore it will be used more,<br>
and every battery will last a shorter time. So reports about short<br>
run time are a very positive result. Congratulations. ;-)<br>
<br>
Two hours of continuous use is a reasonable run time.<br>
<br>
I did a test just now; installed 13.2.5 on an XO-1, configured<br>
wireless, stopped powerd (so display is always on), with a fully<br>
charged battery, unplugged power cable, and left it alone in a corner.<br>
<br>
With a battery from 2007, the laptop ran for 2.5 hours.<br>
<br>
With a battery from 2011, the laptop ran for 3.0 hours.<br>
<br>
There are a few things you can do to improve the run time;<br>
<br>
- closing activities before opening new ones,<br>
<br>
- charge, store, and use laptops away from direct sunlight and heat,<br>
<br>
- check you are charging the laptops from a voltage above 11V, because<br>
if they are charged below 10V the batteries might not be charged<br>
fully, (happened to me when charging from a 12V battery which was on<br>
the way to recycling),<br>
<br>
- check for damage to battery contacts on the laptop, or the<br>
batteries, as this may cause early shutdown, (happened to me so far<br>
on two batteries since 2006),<br>
<br>
- when a battery is taken from storage for the first time, treat it<br>
with a couple of charging cycles before you rely on it,<br>
<br>
- try turning on automatic power management in Sugar My Settings; on<br>
very old XO-1 sometimes it works well, but sometimes the keyboard or<br>
touchpad may not work.<br>
<br>
If you wish to investigate further, unpack the attached ZIP file onto<br>
a USB drive with nothing important on it, and boot it in the laptops<br>
one by one.<br>
<br>
It will automatically save the power logs, which are a record of power<br>
draw and battery capacity over time. Then it will turn the laptop off.<br>
<br>
After you've used it, send me the file pwr.tar from the USB drive.<br>
<br>
I can look at the measurements to figure out if things are all fine.<br>
Battery serial numbers will be in the file, which will tell me the<br>
date of manufacture.<br>
<br>
Or, you might do this and keep the pwr.tar file yourself.<br>
<br>
Hope that helps!<br>
<br>
References:<br>
<br>
<a href="http://wiki.laptop.org/go/Power_Log_Collector#Open_Firmware" rel="noreferrer" target="_blank">http://wiki.laptop.org/go/Power_Log_Collector#Open_Firmware</a><br>
<br>
--<br>
James Cameron<br>
<a href="http://quozl.linux.org.au/" rel="noreferrer" target="_blank">http://quozl.linux.org.au/</a><br>
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<br></blockquote></div>