Hi MoSail,
This is the single most problematic issue about the Soundlink Color II. It's always turning on when one of its recognized Bluetooth devices turn on. And once it turns on and is connected to the Bluetooth device, it stays on. That turn off after designated time does not work if there's a valid Bluetooth connection. I always have to be aware and turn it off or it's out of power in a couple of hours after turning on automatically. I often turn it to the external hookup setting by pressing that third button from the left that disconnects it from Bluetooth without turning it off. That keeps it off, incidentally, when you physically turn it off while that button is engaged. But it's a kludge. There must be a better solution.
