Basically noticed this last night using the timer. Set it for 30 minutes timer so that it would shut off once I am asleep. The music stopped but when I woke up my battery was down to half. Looking into the battery stats, Xiia held the wake lock it had throughout the night so the phone never went into sleep mode properly. This should be fixed so that Xiia isn't holding a wake lock it doesn't need while idling.
Customer support service by UserEcho