Battery life is one of the most important feature on mobile computer. That's why I have been doing some testing with my Eee PC 900..
These test were done under full load, using Battery Eater.
I disabled all battery savings, brightness was at 100% and wifi was on.
I also disabled standby at 10% so these numbers show the results from 100% to 0%.
You can use Eee PCs at 630Mhz or 900Mhz and these tests clearly show the difference.
You can get easily 30 to 50 minutes more battery life by setting the cpu speed to 630Mhz from either BIOS ( 0302 ) or with eeectl software.
The second difference on battery life can be seen on this diagram:
It jumped from 40% to 10% in 2 minutes...
After I disabled the default "shutdown at 10%" I got 30% to 40% more battery life!
Typically laptops are set to shutdown or sleep at 3%, but for some reason Eee PCs can only be set to do it at 10%. Worst part is that as Asus battery meter is so inaccurate it may shutdown your computer when it thinks there is only 10% left, even it can be 30% to 40%.
Not good Asus! They really should fix this.
Mix this with the news that Eee PCs are shipping with different sized batteries in different countries... not good..
As for the batteries, I can highly recommend:
Mugen 7800mAh for best size vs power option
MonoMobile 5200mAh for second battery ( about 50 dollars )
MonoMobile's new Super Large 10400mAh for extreme need ( 5 hours 45 minutes on full load test! )
Eee PC batteries at Conics.net
Wednesday, May 28, 2008