Posts by roys

It's because DELL is gonna cheating us http://www.notebookforums.com/thread175313.html But before that, I have the same problem, each time I used the battery to below 10%~8%, then the wear level will increase 3%. After I discharge...

I get this information when the machine just arrive...... I interesting in the "Designed Capacity" from DELL self-test CD is show that only 78000mWh(78Wh)...... also, any brothers that using 640m can try the software...

I bought a dell inspiron 640m a month ago, and I find that the Capacity printed on 9-cell battery is 85Wh, but when I using Self-Test CD to boot up and get the battery Information, it told me the battery is only 78Wh (78000mWh), and...