I just got this phone as a replacement for my Droid X. It had been replaced a few times and they offered, and I am not going to refuse a new toy, so here I am. It came with GB, so I am unfortunately not rooted. On 2.3 with this thing, I get amazing battery life even considering how low the signal is compared to my DX (avg. 15dbm less). Even at -90 to -100dbm I get a lot out of this phone. Today I am at 16 hours and have 55% remaining with fairly heavy usage. 3 hours of screen on, taking 50%. This means I should get close to 40 hours with heavy usage and even better when I use it lightly. When I took it off the charger, I only used it for maybe 10 minutes in the first 8 hours and it was still at 91%. Wow. Also, I never turn off data and weather, FB and twitter each sync every 30 min.
Definitely the best battery life I have ever seen on a smart phone. Once rooted I will be very happy with this device.