Love Juice Defender for this screwed up phone.
Should not need to run it to save the battery, but the way it works on the network, IIRC toggling between 1g & 3g it eats the battery fast.
Without it turning on and off my 3g to get my emails and sync apps, I would only get 8-10hrs max on the battery.
With Juice Defender after 18 hrs I still have mid 60% left on the battery.
If it was not for juice defender, this phone would have been in the trash months ago....
Power Toggles is very nice for quick and easy customization.