UPDATE: On third day use, I kept the charger plugged in for most of the day. Odd, but battery life improved. It’s been 9 hours and I’m still on full bar. It is apparent therefore that the drain really comes in when you start doing wireless Internet and other such functions apart from calls and text. I checked other websites and they confirm the same thing as well — battery life is significantly less, but if all you do is SMS and call, you’ll get by on a single charge.
I was able to borrow a Nokia N97 mini for the weekend. I’ve been using it for two and a half days. Despite being a new release, the phone suffers from two things which I think is integral to day to day use — weak battery life and a noticeably weaker signal similar to the E71.