HTC Thunderbolt Battery Life?

Totally depends on how hard you use it, and what your doing while you use it. There are lots of settings that also effect the drain. Personally I would average 6 hours tops. On the stock ROM. Lots off texting and browsing, and the occasional game. After rooting and loading a custom ROM I gained approximately 2 hours. The number 1 best way to increase your uptime is to grab yourself a battery for the rezound! It fits and I get over 10 hours consistently. On a light use day I'll have enough battery left I won't even plug in when I go to bed. I can't say how much it will increase the life on stockROM, I haven't been stock in months.

I have owned TB for over a year. Battery life has not been an issue. There are many posts on how to maximize battery life. I use the phone similiar to you. I charge every night and usually have 40% or more of life. The TB has been great, outside of a MMS issue resolved in the last update - no FC's, random reboots, or other problems. It is as fast as dual core phones, especially on Vzw 4G network. Always connects to available wifi. Highly recommend.

thunderbold has prolonged battery get it final approximately 18 hours have it yet seems larger is the downfall approximately it and yest 3G makes the batter final approximately 10 hours with inventory battery (whilst the 4G went down around april my battery laste the full day with out charging