I made a point to say how long the screen was on for a reason. 3 1/2 hours with the screen on. With any android phone, the screen is going to be the largest drain on the battery. I do get good reception everywhere I go, so that helps. On my droid X with extended battery, if the screen was on for 3 hours, I was dead by the end of the day. With the Tbolt, if my screen was on for 3 hours, I only had 2 hours of standby before it was shutting itself off. Same with the Incredible. With any of my past phones, I would rarely use the live wallpapers. With the charge, it is all I use. I also would turn the screen to auto, with the Charge it is 100%, 100% of the time. As far as lag, I use launcher pro plus, and dont notice any lag. The phone is really zippy. The browser can be a little laggy, if I try to scroll before the page finishes loading. Once it is loaded, no lag at all. Again, to me, the battery life is amazing. Better than any other android I have had. My one complaint on the phone so far, is how long the camera takes to save the picture, and be ready for another. That, and a few simple features that are absent. Like the fast motion video that was on the X, no kickstand like the Tbolt, the fact the "home" button doesnt wake the phone... All stuff I knew about before getting the phone.