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.
I think it will be very hard to perform the same test under the same conditions as you suggest because: - It will be very time consuming (though it doesn't need a lot of attention during the test) - 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 ;) ) The closer I might get, which I think could be pretty close is: - Install the SAME fresh OS image and firmware version on all the test XOs - Disable power management in every XO - Keep the XOs close together - The laptops batteries are mostly charged, so it will be a charge after discharge, so I think temperature there is less of a concern - Run the tests at the same time in every XO Ismael 2011/3/24 Richard A. Smith <rich...@laptop.org> > On 03/24/2011 10:31 AM, Richard A. Smith wrote: > > If you run _exactly_ the same test under the same conditions. Same >> temperature, same test duration, same XO, then it might be possible to >> compare the current voltage, >> > > 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. > > > -- > Richard A. Smith <rich...@laptop.org> > One Laptop per Child > -- Ismael Schinca Centro Ceibal - Depto. Técnico - I+D Avda. Italia 6201 - Edificio Los Ceibos Montevideo - Uruguay. Tel.: 2601 57 73 Int. 2232
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