I'm facing the same problem and even less than 2 weeks and by the way
the phone was sealed and I saw from where they bring it ... but really
my note 8 battery which is 2.5 years old almost the same ...??
this is unfair ... the phone was fine just couple of weeks before the
launching the new note 10 ... but suddenly the high temperature and 5
hours battery maximum that you can get from note 8 currently... why