Share your experience!
My phone is 5 months old. My battery perfromance is going worse day by day.When i took from charging after 100% suddenly it drops to 98% and also average of 6-8% of battery will get drained even if i am not using the phone. It became worse in browsing and games,the battery ll drain upto 50% in 15 mins.My friends who were using Xpeira m and xperia c ,their battery is just getting drained 1% for 1 hour even they enabled internet. Please help me to resolve this. SP is a good phone but annoyed by the battery performance.
Same problem regarding battery drain when phone is not in use
I noticed this issue when phone is continuously running over 150 (sometimes about 300) hours without turning off / restarting... Even if in "airplane mode" during night, inexplicable draining battery is very quick. I do not use any task killer, any memory optimiser and any similar apps...
I have the same experience with my Xperia SP predecessor LG Optimus Black... So question is: "Is this Android "feature" ?" 
1)disable google play services.Go to settings->apps->all->google play services->disable
2)More(below bluetooth) change network mode to gsm only
3)turn on stamina mode
4)charge to 100%
5)disable auto sync
Trust me,my life has almost doubled.See if this works for any one of you