I was having similar issues to some where I would lose 2% within a half hour of unplugging my Tbolt, and then be down to 10% about 12 hours later with light use!
I am rooted, so I don't know if there is a way to do this stock, but I recently did this which has drastically improved battery life to where I am down to only 82% after 6 hours of moderate use (calls, Angry Birds, YouTube).
- Fully charge your phone
- While still on the charger, I rebooted into recovery and reset/wiped my battery stats
- Used the phone heavily to get it almost dead
- When the phone auto shuts off near death, I booted into recovery
- Leave phone alone to fully die as recovery leaves the screen on and doesn't turn off
- After phone dies, fully charge again before use
After doing this, my battery life was greatly improved. Nothing else changed.