installing 2.01 helps battery a LOT. I installed it yesterday and still can't believe the difference it had overnight. I had pretty lousy battery when I had bought it, is yours pretty new?
You should remember to always kill your apps with an app manager so they don't drain your resources, disable wifi, and 3g through APN to save battery. This helps a lot. Also you might wanna use brightness at minimum and remember to always turn the screen off when not using it.
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