iPhone 6s lasts me all day. Charged overnight, 5am (100%) - 10pm (30%) at weekends I don't charge overnight. Its always in battery saving mode I don't need a

iPhone 6s lasts me all day. Charged overnight, 5am (100%) - 10pm (30%) at weekends I don't charge overnight. Its always in battery saving mode I don't need any background processes. Only whatsapp, emails, slack and sms notifications. wifi only on when at home. Bluetooth only on during commute (about 4/5hrs a day). I've had it a year, it used to do two days but I relented and enabled email notifications.