"Why is my battery draining really fast?" için yanıtI don’t think it has anything to do with apps running in the background, brightness etc. This is an internal issue. My husband charged his phone to 100%, turned it off before leaving for work and when he went to turn it on at lunchtime, it was at 4%. I strongly believe this is a factory defect and it should be addressed by the manufacturer. This issue was not resolved yet.