My phone for past few days needs charging constantly, loses battery quickly. Had 35% went to bed and it turned itself off as no battery. Happened twice now. 30% supposed to last eight hrs. Just normal apps, fb, Instagram, WhatsApp, daily mail, outlook. Its really annoying and device getting hot. Had similar probs with last Xperia too. Getting upgrade in June! Why does this keep happening. Went to bed last night with 99% battery, woke up to 60% and hadn't used it!