I've noticed a significant boost in battery life ever since the OTA 2.2 update, but I didn't anticipate this much. I purposely neglected charging my phone for the last few days, and here's where I stand: That's 40% after 78+ hrs. Sure I didn't use the phone heavily, but it's not I turned off everything either. And the phone was on the entire 78 hrs (didn't cheat by shutting it off at night). I basically did a little of everything throughout - browsing, calling, texting (mostly), and even navigation and maps! It's like my DX thinks it's running on an extended battery!