In an attempt to save battery I turned off... auto-sync, LTe, use wi-fi when I can, got the Rezound battery, only have links to websites instead of apps that sync, turned off syncing Google calanders and contacts, no downloaded music, no downloaded themes or keyboards, turned off gps, vibration, and animations. When not in use, the battery can last all day with just a very slight decline, with percentages remaining in the 90's and high 80's. But the second I make a call or browse the web, battery steeply drops. Before long, its in 50-40%. Just wondering if I need to calibrate the battery and is this normal behaviour..as I'm hardly using this phone as a feature-rich smartphone. Thanks for any help.