Brand new Note. Charged it fully for the first time. Played with it for 20 minutes. Installed only one app, Jewels. Unit was hot, thought it was the charging. Went to bed. Woke up six hours later, phone was hot! Battery has only 40% left. Checked and found Android OS used 92% of it. What could be the runaway process? Switched it off and then on again. Appears to be ok now. How to prevent such silent killers in future? Thanks. PS:Submitted this from my Note. Having a tough time. Despite my big screen the text input box appears to be hard-coded in width.