My thunderbolt has been off the charger for over 4 hours now and im still around 90% battery. Here is what I have changed to make my battery last.
First I turned off the LTE service through the dialer instructions in this link.
http://forum.androidcentral.com/htc-thunderbolt/70282-how-turn-off-lte.html
Also under location in the settings I turned off the VZW location service. There are 3 location settings there. VZW, standalone GPS, and Google location.
That was all. It seems like the VZW location runs constantly.
I changed these setting yesterday afternoon and my battery lasted the rest of the day. I unplugged in again this morning around 4 hours ago and its still going strong. Someone try this and verify that it works.