I have found a bug with this app.
I use my N900 in my work and use a plantronict BT headset.
usually the headset connects fine. but now when I connect the headset it does not turn the audio stream off.
wich will consume the battery in a couple of hours.
I did not activate the BT disconnect in this application but the problem came after I upgraded to the version with BT support.

I uninstalled the application and the problem is gone.

I have BT always on and cant say it consume a lot of battery as long its idle.