Good evening everyone. It's been at least 10 months since I had this problem. My X Compact, as I always read, should last an entire day, with more than 3 hours of screen on time. Instead, my phone barely reach the night with 2:50 hours of screen. No matter how many times I have donne a factory reset, or done a repair with Xperia Companion (the last one 3 months ago). My phone discharges at astonishing speed. At 13:00 in 3G, I only have 60% of battery left, with only 30 minutes of screen.
The process that is at the top of the battery consumption is always "Phone idle".