I have to confess that i have tried activity manager to save energy a little bit by loading up an empty screen and it still drained my battery. I am assuming it has not been optified right?
I try to install or do things that will help the device be faster or save battery life. I have overclocked to ideal, changed transitions and freed up a little rootfs but when i installed this, it totally was the cause for major battery drain. I dont know why either. I took off several profiles and changed settings and widgets in each one and no matter what it would act like it was running several desktops and kill my N900.
I really like the app but too bad it kills the battery =/. Maybe when it goes to extras and becomes optified but right now its no bueno as far as battery life goes.