The battery is an easy workaround. This is an HTC phone, and they're notorious for shipping their phones with lousy batteries. No big deal, pick up an extended battery and it will solve your problem. Trust me - been there/done that with my Droid Incredible. The Seidio 3500 extended battery for the Dinc *solved* the battery problem completely. I can go two or more days without charging, leaving the Dinc. on 24/7 - it's fantastic! I hope Seidio comes out with a similar extended battery for the Thunderbolt, cause I'm grabbing it in a heartbeat.
-Mike
Does 2750 mAh work for you?
HTC Thunderbolt Extended Battery & Door Cover (2750 mAh)
Better than nothing - Thanks!
-Mike
Sure thing. Let us know how it turns out.