This app helps me to track down my battery 'drain' problem. I was getting at most 2.5 day of battery life. I tracked hourly and found out that the battery was depleting at about 1.6% per hour. I tried to remove home and statusbar applets but to no avail. Finally I removed my external MMC1 SD card (a 2GB Kingston Elite Pro SD), and it immediately dropped to around 0.5% per hour -- which would work out to be around 8 day standby ! Not sure why the presence of MMC1 card causes the extra 1% drain. But I would remove the card for the time being.