Hello, I bought my Xperia Mini 26 days ago. But I am having some major battery problems already. When the battery charge level decreases to 50% my phone automatically displays a message that the phone battery is low and shuts down. It won't even turn on unless it is chanrged. I know the rules to save battery life, I have already done the following: 1. Turned off Wi-Fi, Bluetooth 2. Switched to 2G when at home from 3G 3. I have a very low screen brightness 4. Turned off GPS when not needed 5. Disabled the display bravia engine, animations and screen auto rotation Still my phone shuts down at 50%. I don't know what is the problem. Can you please help? Thanks in advance !