If you have purchased or are considering this device, some good advice 
on battery life, some of these have been useful to me.

http://www.droidforums.net/forum/htc-thunderbolt-battery-discussions/132327-tips-help-improve-battery-life-thunderbolt.html

-- 
Roger Bombardier Jr.
Enterprise Information Technology Professional
University of Vermont – ETS – Client Services
[log in to unmask]
Office (802) 656-7744
For pressing issues: Cell (802) 922-0444
Operating Hours: 08:00 – 16:30 M-F

"In times of universal deceit, telling the truth will be a revolutionary act." -George Orwell