WOW, I rarely post but I just had to put in my 2 cents. upon buying it the launch day, I had fun playing with it but the next day would be the test. Next day, took it off charge at 9am, proceeded to do my bike routine, this time with a cycling program that need to have NAV on to monitor my ride. I did a 55 mile road bike ride with Endomono running(cycling monitoring program), Streaming Music through Bluetooth and a few calls. after 3.5 hours I was at 70%. Went to a local pub (to replenish my fluids...lol) made more short calls, checked emails, didn't surf that much. Down to 60+, because i don't know if 60% is 62 or 68, anyways long story short. I went 12 hours and never got beyond 50% of battery left, The other great thing, I actually started using live wallpaper again, totally awesome. I came from the DINC, love the phone, wanted bigger screen, then on to the Thunderbolt, loved it even more, even with it being rooted and extra larger batteries, but would love more battery usage, was going to get the regular Razr for my wife because I was content with the Thunderbolt. WOW, I am so glad I changed, not because of it being a Razr, but because of not bringing extra batteries, not turning down any settings. I have already rooted the phone, only for hotspots, but I don't know if I will add a newer ROM on this device when the become available,,in other words...GAME CHANGER AND GAME OVER. the other boys will really have to step up their game, selling on features caries no merit if there's no JUICE..LOL