I think it's import for me to mention this.

I have had my N900 for a year or more and I never had excessive battery problems until yesterday, I noticed that I had about 7 hours battery life.

So after thinking about the changes I made and looking at conky. I found that there was an application called "hulda" that was taking 95% of my cpu time, etc. I couldn't find any reference to "hulda", I then remembered that I added the dual/2g/3g application, so I removed it, and rebooted the n900.

When looking at Conky again, hulda had gone and my battery life is now back to normal.

I hope this helps someone.