i don't use any of the battery stretching apps but i've read a lot about juice defender, may or may not be useful.
you might want to try to understand why your batt is draining that fast. for instance, are you polling for email more frequently than necessary? downloading news feeds in the background that you're not even reading, etc?
if you are connected to 4g but are in a poor coverage area, that could explain it too. you can drop the phone down to 3g (cdma) only and save a lot of batt when your not actively using data. just a thought.