battery drain

Who else have battery issues with his instinct? i feel like from some time ago to this day, the battery drains faster. the battery drains one bar after 24-26 hours even though i´m not using it for any gps or fitness activity, just heart rate and tracking. I´ve also tried turning off the day tracking and bluetooth conection and it feels the same. Is it possible that is due to the last actualization ? i´m mad at this.. i have already used  the warranty with my first instintc about 12 days after i got it because of some moist inside the screen and i would hate to have the need to change it again for a new one :)