<meta http-equiv="content-type" content="text/html; charset=utf-8">I'm planning to use different XO's, all of them 1.0 hardware. I definately won't be able to finish today because they all have different OS images and I think it would be best if I update them all (even for future tests). Maybe tomorrow, maybe monday.<div>
<br></div><div>I think it will be very hard to perform the same test under the same conditions as you suggest because:</div><div>- It will be very time consuming (though it doesn't need a lot of attention during the test)</div>
<div>- The air conditioning in our building is quite frankly chaotic so temperature is really variable (which is actually a lot worse for us humans than batteries ;) )</div><div><br></div><div>The closer I might get, which I think could be pretty close is:</div>
<div>- Install the SAME fresh OS image and firmware version on all the test XOs</div><div>- Disable power management in every XO</div><div>- Keep the XOs close together</div><div>- The laptops batteries are mostly charged, so it will be a charge after discharge, so I think temperature there is less of a concern</div>
<div>- Run the tests at the same time in every XO</div><div><br></div><div>Ismael</div><br><div class="gmail_quote">2011/3/24 Richard A. Smith <span dir="ltr"><<a href="mailto:richard@laptop.org">richard@laptop.org</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div class="im">On 03/24/2011 10:31 AM, Richard A. Smith wrote:<br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
If you run _exactly_ the same test under the same conditions. Same<br>
temperature, same test duration, same XO, then it might be possible to<br>
compare the current voltage,<br>
</blockquote>
<br></div>
Battery temperature will also be a concern. If you test the discharge immediately after a charge when the battery is hot you are going to get a different result than if the battery was sitting on the table all night and is at room temperature when you start the discharge.<div>
<div></div><div class="h5"><br>
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-- <br>
Richard A. Smith <<a href="mailto:richard@laptop.org" target="_blank">richard@laptop.org</a>><br>
One Laptop per Child<br>
</div></div></blockquote></div><br><br clear="all"><br>-- <br>Ismael Schinca<br>Centro Ceibal - Depto. Técnico - I+D<br>Avda. Italia 6201 - Edificio Los Ceibos<br>Montevideo - Uruguay.<br>Tel.: 2601 57 73 Int. 2232<br><br>