My Thunderbolt is two years old in just a few weeks. I only hope it will make it until I can get a Galaxy S4.
The Thunderbolt battery has been an embarrassment from day 1. Horrible, typically only allowing a few hours use without being connected to a charger. I would have it connected to a charger at my desk at work, in my car, and at home. Battery notwithstanding, the phone features, camera, and functionality were great.
Now the battery will often not last more than a few hours, even when I am only carrying it, and not using it. Recent new issues include the phone randomly shutting down several time a day, with the battery greatly reduced when it restarts. I am experiencing 3-5 second lags when using the phone normally.
I am so very very ready to move on from this paperweight.