Last night I went to bed, having put my N9 on Silent as I always do, but this morning, the phone was off and wouldn't turn on. I connected the charger, and the white battery icon appeared, showing an empty battery! This happened to me a year or so ago with my trusty N900, but back then nobody had an explanation for me. I am perplexed as to why this should happen out of the blue.

From now on, I think I'm going to have to turn it off at bedtime if I need to use it straightaway in the morning (which is 99% likely) as I don't want this happening again.

Anyone else had this problem?