I've been getting 2 days (more or a little less) on my standard battery. Now, I'm not on the web for hours or stream videos or watch movies...yet. Only had my Rezound for almost 2 weeks using it mostly for photos, email, talking, and about 20 - 30 minutes of looking around the net setting up bookmarks in the evening. It's gone through about 4 rechargings overnight. I don't have any email 'push' settings only manual retrieves once in the morning and again in the mid-afternoon.
Power mode is 'Economy', Economy mode settings 'Normal' - disable background data, disable Wi-Fi, disable bluetooth if not connected, Screen brightness 'Auto Setting' brightness shows at 36%, screen timeout set at 30s, Onscreen animations disabled, Vibrate feedback box checked. Wireless & Network - all boxes unchecked. In Task Manager only have Settings, Internet, Messenger, and Mail running most of the time. Also have 3G only set as I don't live in a 4G area. I do check TM often to see what else I might have tapped by mistake. For what I use it for, it's really nice not having to plug it in every night. Hope this helps someone out there !