I don't know whether it is device fault or a software bug, but battery performance seems to be very poor. Maybe GSMArena, try to retest with different device just to be sure. Sony has been doing great in battery department, so that 47 hours endurance seems to be mistake.
pain Samsung, 21 Apr 2015great i love itamazing!!it beats every other phone in every benchmark!!and gsm arena says audio output is best!sony rocksssss!the phone to buy this year!